トップ精工 List of Products and Services

Diffusion bonding is a technology that directly joins materials together. Since it does not use adhesives or filler materials, contamination issues due to impurities do not occur. Additionally, it can suppress the occurrence of plastic deformation. By using diffusion bonding, it is possible to create hollow structures, internal flow paths, and deep holes with good straightness that cannot be achieved with conventional machining. We have a helium leak tester, so leak testing can also be conducted. 【Materials with Diffusion Bonding Achievements】 - Alumina - Aluminum nitride - Quartz glass - Silicon - SiSiC composite material - Pure molybdenum - Pure nickel We are also developing other materials. We are distributing a collection of processing examples using bonding, so please take a look. Shapes that were previously difficult to achieve may be possible by combining diffusion bonding with machining. If you have such parts, please feel free to contact Top Seiko. *The "Company Profile" was updated in December 2022. Please download it along with the "Bonding Processing Example Collection" from the link below.

• Processing Contract

We are also skilled in three-dimensional processing of quartz glass, so we would like to introduce some processing examples. Using the 5-axis controlled vertical machining center D300, we have developed a three-dimensional grinding processing technique to create a model of the Colosseum, a UNESCO World Heritage site in Rome. Approximate dimensions: 18 mm octagonal shape × height 100 mm. We have uploaded a production video on YouTube, so please take a look at the processing in the video section below. ◎ We can solve your problems with glass processing products, including deep holes, grooves, and complex shapes. ◎ If you have any concerns about whether a certain processing can be done on a specific material, please feel free to consult with us. We will select the best processing method tailored to the material characteristics and processing content. We have many achievements in meeting customer requests. *For more details, please refer to our catalog or feel free to contact us.

• Processing Contract
• Glass

At Top Seiko, we propose the best materials with characteristics suitable for the usage conditions. In addition to cases where customers are developing and launching new products, there are numerous examples of customers successfully changing the material properties to improve product performance, lifespan, productivity, and yield. 【 Case 1 】 Company I (Electronics Manufacturer) ■ Previously used material / Application - Alumina / Heat treatment process ■ Issues - Frequent problems with alumina jigs breaking at high temperatures ■ Our Proposal - Tungsten ■ Evaluation after improvement - Productivity increased * For more details, please refer to the PDF materials or feel free to contact us.

• Other contract services

At Top Seiko, we propose the best materials with characteristics suitable for the usage conditions. In addition to cases where customers are developing and launching new products, there are numerous examples where changing the material has led to improvements in product performance, lifespan, productivity, and yield, contributing to customer success. 【 Case 1 】 Company E (Automotive Parts Manufacturing) ■ Previously used material / Application - SUS / Jigs and weights for automotive product manufacturing ■ Previous issues - A specific gravity of 17.5 or higher is required to reduce volume - Corrosion resistance to chlorine and sulfur is also necessary ■ Our proposal - Heavy metal ■ Customer evaluation after improvement - Specific gravity of 18 achieved, and corrosion resistance has also improved *For more details, please refer to the PDF materials or feel free to contact us.

• Other contract services

At Top Seiko, we propose the best materials with characteristics suitable for the usage conditions. In addition to cases where customers are developing and launching new products, there are numerous examples where changing the material has led to improvements in product performance, lifespan, productivity, and yield, contributing to customer success. 【Case 1】 Company A (Manufacturing plastic parts) ■ Previously used material / Application - Acrylic / Parts for laser welding machines ■ Previous issues - There were problems with the heat resistance of acrylic, leading to burning - Polishing was required twice a week to remove the burn marks ■ Our proposal - Synthetic quartz glass ■ Customer evaluation after improvement - No need for re-polishing. Additionally, since there is no decrease in transmittance due to burning, the laser output can be reduced, leading to energy savings. *For more details, please refer to the PDF document or feel free to contact us.

• Other contract services

At Top Seiko, we propose materials that have characteristics suitable for the development and launch of new products, as well as for improving product performance, lifespan, productivity, yield, and other factors. Since we do not manufacture materials ourselves, we are not limited to proprietary materials and can select and propose the best materials with a customer-oriented approach. Material procurement is possible not only from domestic manufacturers but also from overseas manufacturers. We also maintain inventory of materials. 【Case 1】 High Density (Volume) ■ Usage Conditions / Issues - Weight is required, and we want to reduce the volume compared to the currently used parts. ■ Currently Used Material - General Metals ■ Proposed Material - Tungsten *For more details, please refer to the PDF document or feel free to contact us.

• Other contract services

At Top Seiko, we propose materials that possess characteristics suitable for the development and launch of new products, as well as for improving product performance, lifespan, productivity, and yield. Since we do not manufacture materials ourselves, there is no need to be tied to proprietary materials, allowing us to think from the customer's perspective and select the best materials to propose. Material procurement is possible not only from domestic manufacturers but also from overseas manufacturers. Additionally, we also hold inventory of materials. 【 Case 1 】 Chipping and Cracking Countermeasures (High Toughness) ■ Usage Conditions and Issues - Currently using ceramics, but chipping and cracking occur. ■ Currently Used Material - Alumina ■ Proposed Materials - Zirconia, Silicon Carbide * For more details, please refer to the PDF document or feel free to contact us.

• Other contract services

At Top Seiko, we propose materials that have characteristics suitable for the development and launch of new products, as well as for improving product performance, lifespan, productivity, and yield. Since we do not manufacture materials ourselves, there is no need to be tied to proprietary materials, allowing us to think from the customer's perspective and select the best materials to propose. Material procurement is possible not only from domestic manufacturers but also from overseas manufacturers. Additionally, we maintain a stock of materials. 【Case 1】 Rapid Heating and Cooling (Thermal Shock Resistance) ■ Usage Conditions and Issues - We want to increase productivity through rapid heating and cooling, but the currently used parts and molds warp or break, preventing productivity improvement. ■ Currently Used Materials - Aluminum alloys, steel, stainless steel, general ceramics ■ Proposed Materials - Aluminum nitride, molybdenum, tungsten *For more details, please refer to the PDF document or feel free to contact us.

• Other contract services

At Top Seiko, we propose materials that have suitable characteristics for the development and launch of new products, as well as for improving product performance, lifespan, productivity, and yield. Since we do not manufacture materials ourselves, there is no need to be limited to proprietary materials. We can think from the customer's perspective and select and propose the best materials. Material procurement is possible not only from domestic manufacturers but also from overseas manufacturers. We also hold inventory of materials. 【 Case 1 】 Heat Resistance (High Temperature) ■ Usage Conditions / Issues - Due to use in high-temperature environments, the lifespan is short and costs are high. ■ Currently Used Materials - Heat-resistant resin, aluminum alloy, steel, stainless steel ■ Proposed Materials - Quartz glass, heat-resistant glass, alumina, zirconia, silicon nitride - Molybdenum (alloy), tungsten (alloy) * For more details, please refer to the PDF document or feel free to contact us.

• Other contract services

Top Seiko is a company that handles various brittle materials products such as ceramics and glass, as well as high melting point metal products like tungsten and molybdenum. For customers who value speed in launching new products, our company supports the development and mass production startup by providing a wide variety of tool inventory, numerous processing machines, and rapid processing based on the experience of skilled technicians. Additionally, depending on the processing requirements, we conduct test processing when necessary. We repeat test processing multiple times until satisfactory results are achieved, determining the best processing conditions. 【Features】 ■ Support for mass production and development startup ■ Implementation of test processing ■ Material selection ■ Selection of optimal processing machines ■ Attachment of measurement data *For more details, please refer to the PDF materials or feel free to contact us.

• Processing Contract
• Other contract services
• Contract Inspection

We are currently offering the "Material Processing Guide & Success Case Collection," which is helpful for material selection in research and development as well as product manufacturing! This guide condenses data on major materials, from high melting point metals like tungsten and molybdenum to common metals like stainless steel, ceramics, metal composites, and glass. It compares items such as heat resistance temperature and thermal conductivity in graphs, making the differences in physical properties immediately clear. We are also providing case studies on productivity improvements through material changes as a set! [Contents of the Material Processing Guide] ○ High melting point metals ○ Common metals ○ Semi-metals ○ Ceramics ○ Glass and more We provide introductions and the latest information on precision cutting products made from hard and brittle materials like ceramics and glass, as well as high melting point metals like tungsten and molybdenum. *We updated our "Company Profile" in December 2022. Please download the "Material Processing Guide" and "Successful Material Change Cases" from the link below!

• Other metal materials

At Top Seiko Co., Ltd., we propose materials with characteristics suitable for our customers' usage conditions. Since we do not manufacture materials ourselves, there is no need to be tied to proprietary materials, allowing us to think from the customer's perspective and select the best materials to propose. We can procure materials not only from domestic manufacturers but also from overseas manufacturers, and we maintain a stock of materials as well. There are many successful cases where customers have changed the material properties to improve product performance, lifespan, productivity, and yield, which we can share. 【Examples of Common Inquiries】 ■ Heat resistance (high temperature) ■ Low expansion ■ High thermal conductivity ■ Rapid heating and cooling (thermal shock resistance) ■ Insulation (low thermal conductivity) ■ Wear resistance (hardness) scratch prevention ■ Chipping and cracking prevention (high toughness) ■ Many others For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Here are some examples of tantalum processing. Tantalum, like tungsten and molybdenum, is a high melting point metal. However, unlike tungsten and molybdenum, which are sintered metals, tantalum is produced through a melting process similar to that of common metals, resulting in fewer material defects. It has good ductility and processability. Due to the high cost of the material, it is often processed into small parts for high-temperature applications. 【Processing Example】 ■Product Name: Tantalum Processed Product ■Material Used: Tantalum ■Processing Method: MC Processing + Wire Electrical Discharge Machining ■Application: Parts for Semiconductor Manufacturing Equipment For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

We would like to introduce examples of tungsten processing. Tungsten has excellent thermal properties, such as high heat resistance and superior radiation shielding characteristics, and is used in applications that take advantage of these properties. Its workability is challenging due to the high difficulty level, as tool wear and product chipping or cracking can easily occur, requiring unique cutting techniques. Our company has established processing technology based on years of experience. We keep the material in stock and can accommodate short delivery times. 【Available Processing Sizes】 ■ Plate dimensions: 400×600×30 mm ■ Round bar dimensions: φ100×300 mm ■ Groove: Width 0.2 mm and above ■ Step: Up to 100 mm ■ Hole diameter: φ0.1 mm and above, etc. For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

We will introduce examples of molybdenum processing. Molybdenum has relatively good machinability among heat-resistant metals and is used in a wide range of applications due to its excellent thermal properties, including heat resistance. The materials are managed in our in-house inventory, and we can accommodate short delivery times. 【Available Processing Sizes】 ■ Plate dimensions: 500×800×30 mm ■ Round bar dimensions: φ100×500 mm ■ Groove: Width 0.1 mm and above ■ Step: Up to 100 mm ■ Hole diameter: φ0.03 mm and above, etc. For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

We will introduce examples of processing composite materials. Our company processes a large number of composite materials (MMC & CMC) based on SiC-Si. We can manufacture larger materials than SiC, and the cost is also superior to that of SiC. We also process several products made from CMC materials woven with SiC fibers. 【Available Sizes for Processing】 ■ Plate dimensions: 600×800 mm ■ Round bar dimensions: φ50×400 mm ■ Grooves: Width 0.05～ mm ■ Undulations: Up to 50 mm ■ Hole diameter: φ0.05～ mm, etc. For more details, please refer to our catalog or feel free to contact us.

• Processing Contract

Here are some examples of sapphire processing. Sapphire transmits light, but it is very hard and resistant to scratches, and it also has high strength. In cases where glass materials cannot be used for products due to scratches or insufficient strength, sapphire is processed. 【Processing Example】 ■Product Name: Sapphire Processed Product ■Material Used: Sapphire ■Processing Method: Sapphire Thin Plate Processing ■Size: 10×20×t0.5 ■Application: Plasma-resistant for semiconductor manufacturing equipment For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

Here are examples of silicon processing. In semiconductor manufacturing, silicon, which is of the same material as the wafer, is processed for applications that avoid contamination and particles. The material for columnar crystals (polycrystalline) is available in large sizes. Additionally, since columnar crystals are not single crystals, their workability for chipping, chipping, and cracking is good. 【Processing Example】 ■Product Name: Dome-shaped Electrode ■Material Used: Silicon ■Processing Method: Spherical Processing ■Size: φ60 ■Image sample is processed with a machining center for uneven surfaces. For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

We will introduce examples of processing quartz glass and heat-resistant glass. Quartz glass is softer and can be processed more efficiently than general ceramics. The main point of caution in processing is its fragility, so our company aims to minimize damage to the material during processing as much as possible. Specifically, this involves managing the wobble of the grinding wheel, using high-grit diamond particles, sharp diamond particle shapes, and soft bond grinding wheels. 【Processing Example】 ■Product Name: Shower Plate ■Material Used: Tempax ■Processing Method: MC Processing ■Size: φ2.0, 2,000 holes ■Application: Gas introduction for various manufacturing equipment For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

We will introduce examples of processing quartz glass and heat-resistant glass. Generally, it is possible to manufacture larger materials compared to ceramics, and both material and processing costs are often lower. It is widely used in applications that take advantage of its thermal properties and chemical resistance. When transparency is required for ultraviolet and infrared transmission or visual confirmation, we outsource wrapping and polishing to external parties. 【Processing Example】 ■Product Description: Quartz Dome ■Material Used: Fused Quartz ■Processing Method: MC Processing (Continuous processing for about 3 days) ■Size: φ60 x t10 For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

We will introduce examples of machining with machinable ceramics. Machinable ceramics can be processed through cutting, and their machinability is significantly better compared to traditional ceramics, making them suitable for fine and precise machining. They are also suitable for small-scale prototypes. Various materials with different properties are sold by material manufacturers, and we select and purchase materials that meet our customers' requirements for processing. 【Machinable Sizes】 ■ Plate dimensions: □300×t50 mm (depending on the material) ■ Round bar dimensions: φ50×300 mm (depending on the material) ■ Groove: Width 0.03 mm and above ■ Step (unevenness): Up to 50 mm ■ Hole diameter: φ0.01 mm and above, etc. For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

Here are some examples of machining with machinable ceramics. Machinable ceramics can be processed through cutting, and their machinability is significantly better compared to traditional ceramics, making them suitable for fine and precise machining. They are also suitable for small-scale prototypes. Various materials with different properties are sold by material manufacturers, and we select and purchase materials that meet our customers' requirements for processing. [Processing Example] ■Product Name: Fine Hole Machined Product ■Material Used: Macerite ■Processing Method: MC Drill Processing ■Size: Fine Hole Processing φ0.2, 1,500 pieces For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

We will introduce examples of processing silicon carbide (SiC). Silicon carbide is widely used for its excellent thermal properties and chemical resistance. Additionally, MMCs (Metal Matrix Composites) with silicon infiltrated into the silicon carbide substrate are also processed into many products due to their excellent thermal properties. 【Available Sizes for Processing】 ■ Plate dimensions: φ400×t20 mm ■ Round bar dimensions: φ50×300 mm ■ Groove: Width 0.1 mm and above ■ Step (unevenness): Up to 30 mm ■ Hole diameter: φ0.1 mm and above, etc. For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

Here are some examples of zirconia processing. Compared to alumina, which is also a metal oxide, it is difficult to manufacture large materials, and the material costs are higher. Therefore, it is often used for relatively small parts that require high bending strength and fracture toughness (resistance to cracking and chipping). 【Available Processing Sizes】 ■ Plate dimensions: φ350×30 mm ■ Round bar dimensions: φ50×300 mm ■ Groove: width 0.1 mm and above ■ Step (unevenness): up to 30 mm ■ Hole diameter: φ0.2 mm and above, etc. *For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

We will introduce examples of processing aluminum nitride (AlN). It can be used at high temperatures (in non-oxidizing atmospheres) and is widely used in applications requiring high thermal conductivity at elevated temperatures, such as components, heater materials, and heat dissipation plates. 【Available Sizes】 ■ Plate dimensions: φ350×30 mm ■ Round bar dimensions: φ100×200 mm ■ Groove: Width 0.05 mm and above ■ Step (unevenness): Up to 30 mm ■ Hole diameter: φ0.03 mm and above, etc. For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

Here are examples of processing "Alumina," the most popular material among ceramics. "Alumina" is relatively inexpensive compared to other ceramics and has good machinability, making it widely used in various applications such as high-precision parts, jigs, wear-resistant components (nozzles, etc.), structures and parts for high-temperature environments, and crucibles (hearth liners). 【Available Processing Sizes】 ■ Plate dimensions: 500×800×30 mm ■ Round bar dimensions: φ100×300 mm ■ Grooves: Width 0.05 mm and above ■ Steps (protrusions): Up to 70 mm ■ Hole diameter: φ0.1 mm and above, etc. For more details, please refer to the catalog or feel free to contact us.

• Processing Contract

Top Seiko has accumulated technology with the motto, "What can be processed in iron can also be done with ceramics, tungsten, and molybdenum." While we primarily focus on ceramics, quartz glass, and high-melting-point metals, please feel free to consult us if you have new materials or materials that are difficult to process. We can respond quickly from a single prototype to mass production. ◎ For a limited time, we are offering a collection of case studies with product processing sample photos as a gift! 【Processing Examples】 ■ Molybdenum dome (spherical radiation hole processing using a 5-axis machining center) ■ Fine groove processing on pure tungsten ■ Wall thickness 0.3 mm alumina; material: 99.5% pure alumina, machined from a block * For more details, please download our catalog or feel free to contact us.

• Ceramics
• Processing Contract

Our company specializes in processing difficult-to-machine materials such as various ceramics, tungsten, molybdenum, and tantalum. Please take a look at our equipment list that enables processing at the micron level. With our extensive machinery, we provide custom-made parts to our customers with short lead times and high quality. We plan to actively invest in equipment and expand our factory in the future. <Equipment List> - Over 80 CNC machining centers - More than 15 5-axis machining centers - 7 CNC multi-tasking lathes - 3 wire electrical discharge machines - 3 small hole electrical discharge machines - 4 three-dimensional measuring instruments - 2 image measuring instruments - Keyence laser microscope - Clean room Class 10000 (5-tank pure water ultrasonic cleaning system) *For more details, please refer to the PDF document or feel free to contact us.

• Glass

We perform grinding, cutting, and polishing of various ceramics, quartz glass, and difficult-to-machine materials such as tungsten and molybdenum. With the motto "If it can be processed in iron, there is nothing that cannot be processed in other materials," we have accumulated technology over the years. We primarily use machining centers, owning over 70 three-axis machines and more than 15 five-axis machines, as well as ultra-high precision machines with linear specifications. Additionally, we have a comprehensive range of measuring equipment, including three-dimensional measuring machines, image measuring instruments, and laser microscopes. We have established a quality assurance system, and we can perform cleaning and drying in a clean room, as well as vacuum packaging. Even if there is little experience with ceramics or high melting point metals, we consider factors such as heat resistance, low expansion, high hardness, wear resistance, and electrical insulation to select and propose materials that meet your requirements. If you have new materials or are struggling with processing materials, please feel free to consult with us. 【Business Activities】 ○ Processing and sales of various ceramics and brittle materials such as quartz glass ○ Processing and sales of high melting point metals such as tungsten and molybdenum ● For more details, please download our catalog or feel free to contact us.

• Other electronic parts

The "Material Guide" provides descriptions of various materials categorized by their characteristics and types. Materials such as ceramics, as well as high melting point metals like tungsten and molybdenum, exhibit excellent properties such as heat resistance, wear resistance, and insulation. It also introduces semimetals like silicon and glasses such as quartz glass. 【Featured Products】 ○ High melting point metals ○ Ceramics ○ Semimetals ○ Glass, etc. For more details, please download the catalog or feel free to contact us.

• Other metal materials
• Processing Contract

Top Seiko Co., Ltd. procures and processes various materials such as ceramics, tungsten, molybdenum, and tantalum in-house. We also offer material suggestions based on the intended use of our customers. We select and propose materials that meet your desired conditions, such as heat resistance, low expansion, high hardness, wear resistance, electrical insulation, and conductivity. We can source materials not only from domestic manufacturers but also from overseas suppliers, and we will process them according to your requirements. 【Processing Technologies】 - Shape processing technology - Groove processing technology - Precision processing technology - Micro-hole processing technology - Deep hole processing technology - Screw processing technology, etc. For more details, please download our catalog or feel free to contact us.

• Processing Contract