We provide a comprehensive COF assembly service from mass production to small-scale prototyping, including product development, material procurement, assembly, and electrical characteristic testing.
COF stands for Chip On Film, which is a method of mounting that provides both electrical connectivity and mechanical fixation of driver ICs onto a film-like substrate. It is primarily used for the implementation of display driver ICs, allowing for high-precision mounting of ICs on substrates with fine wiring pitches. We possess numerous integrated facilities, including self-developed equipment utilizing a highly productive reel-to-reel method, enabling us to respond to a wide range of customer needs beyond just display applications by leveraging the product features of COF (film bendability, fine wiring pitch compatibility, thin profile compatibility). **Features** - Technology development aimed at mass production of fine wiring pitch products Mass production track record: 22um pitch, prototype track record: 18um pitch - Not only for the mounting of driver ICs but also accommodating a wide range of customer requirements Implementation of multiple ICs, attachment of reinforcement plates, component mounting, hole drilling, individual piece processing, and conducting various reliability tests.
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basic information
Basic flow (example) [Wafer: supplied by customer] → WT (CP) → Back grinding → Dicing → [Film: design and in-house procurement] → Inner lead bonding (ILB) → Underfill application → Laser marking → Electrical testing → Visual inspection → Defective punching and counting → Packaging → Shipping
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Applications/Examples of results
Driver for LCD panel display, driver for printer head
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Estakaya Electronics Co., Ltd. has contributed to the development of an information-oriented society through the development and manufacturing of LSI (Large Scale Integration) devices and modules. Currently, we are also engaged in the manufacturing and sales of unique development products utilizing our long-cultivated technology and know-how, as well as the sale and service of environmental products to the local community. In the future, we will further respond to the diverse needs of our customers in an evolving society, from the development of original LSI device and module products to the establishment of production systems, as well as the creation of custom-made equipment and tools.