Key advanced packaging technologies are poised to benefit from the AGC products. Wafer-level packaging (WLP) technology – in which the IC is packaged while still part of the wafer – has made remarkable progress with nextgeneration semiconductor and MEMS devices. This has resulted in a growing need for glass wafers – in particular, those that can match silicon’s coefficient of thermal expansion (CTE), thus eliminating the warping that occurs when attempting to directly laminate silicon and glass wafers whose CTE values differ.
Another target technology for the new substrates is fan-out wafer-level packaging (FOWLP), which enhances standard WLP technology to provide a smaller package footprint with improved thermal and electrical performance. It involves joining materials with different CTEs, including silicon wafers, rewiring layers and resin. As combinations and patterns vary from device to device, glass substrates that can provide the optimal CTE for each element are needed. Also, since the alkaline component of ordinary glass can cause contamination in production processes and devices, alkali-free glass is desirable in certain applications.
Designed to satisfy a wide range of customer needs, the new AGC glass substrates can be provided in rectangular and square shapes, as well as traditional round wafers, with thicknesses ranging from 0.2 mm to 2 mm. The lineup includes:
■Glass without alkali
- Glass products that maintain the exact same CTE as silicon through temperatures ranging from ambient air temperature to roughly 250°C
- Glass products covering a wide range of CTE values from 3 ppm/°C to 8 ppm/°C
■Glass with alkali
- Glass products covering higher ranges of up to CTE 12 ppm/°C
About the AGC Group
AGC Asahi Glass (also called AGC, Registered Company name: Asahi Glass Co., Ltd., Headquarters: Tokyo, President & CEO: Takuya Shimamura) is the parent company of the AGC Group, a world-leading glass solution provider and supplier of flat, automotive and display glass, chemicals, ceramics and other high-tech materials and components. Based on more than a century of technical innovation, the AGC Group has developed a wide range of cutting-edge products. The AGC Group employs some 50,000 people worldwide and generates annual sales of approximately 1.3 trillion Japanese yen through business in about 30 countries.