トップ精工 List of Products and Services

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.