Press Room

2002 / 07 / 25

ASE Advances in Fine Pitch Wire Bonding Technology

Santa Clara, California, July 25th, 2002 – Advanced Semiconductor Engineering Incorporated (ASE) (TAIEX: 2311, NYSE: ASX), one of the world’s largest semiconductor packaging and testing companies, unveils today its tri-tier fine pitch (FP) wire bonding development. In tri-tier FP wire bonding, three rows of wiring protrude from the IC pads to provide connectivity to other parts of the IC package. The inner, middle and outer wires are isolated by different loop heights to prevent wire shorting.

Earlier generations of FP wire bonding techniques utilizes in-line pad pitch (single rows of wire) and subsequently staggered pad pitch (two rows of wire) in IC packages. However, as ICs become more complex in design and the demands for its performance increases as the die size decreases, in-line and staggered wire bonding had shortcomings. The increased density of pads and the limited capability of existing packaging equipment and materials caused the lack of intensity in the wire interconnections, which often resulted in lower reliability and frustrated the development of high I/O chip designs. ASE began research into more advanced wire bonding techniques and with the availability of advanced wire bonding equipment, developed the tri-tier FP wire bonding technology to address these challenges. ASE’s tri-tier wire bonding technology is suitably applied to ICs that require the integration of multiple functions onto a limited area such as the chipsets within PCMCIA and multimedia/graphics cards in desktop and notebook PCs.

ASE currently offers its tri-tier FP wire bonding process in plastic ball grid array (PBGA) of as low as 70um and will offer down to 60um at the end of 2002. ASE’s tri-tier wire bonding technology received U.S. and Taiwan patents in 2001. “With IC designers placing more circuits within a smaller die area, and pushing the limits of chip performance, related packaging techniques will need to be improved, ” said J.J. Lee, Vice President of Research and Development, ASE Group. “In addition to our fine pitch wire bonding, we have also developed two to three layers of pads designed to enable chip miniaturization. ASE’s packaging techniques will certainly contribute to the growth in design and development of hi-tech electronic products yielding higher quality and lower cost, ” he added.


About ASE, Inc.

ASE, Inc. is the leading global provider of semiconductor manufacturing services in assembly and test. Alongside a broad portfolio of established assembly and test technologies, ASE is also delivering innovative advanced packaging and system-in-package solutions to meet growth momentum across a broad range of end markets, including 5G, AI, Automotive, High-Performance Computing, and more. To learn about our advances in SiP, Fan-out, MEMS & Sensor, Flip Chip, and 2.5D, 3D & TSV technologies, all ultimately geared towards applications to improve lifestyle and efficiency, please visit: or follow us on on LinkedIn and X: @aseglobal.