Location History:
- Kawasaki, JA (1976 - 1977)
- Kawasaki, JP (1982 - 2004)
Company Filing History:
12 out of 42,508 
5 out of 30 
4 out of 1,641 Years Active: 1976-2004
Title: Yoshiaki Wakashima: Innovator in Semiconductor Technology
Introduction
Yoshiaki Wakashima is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 15 patents. His innovative work has advanced the manufacturing processes and design of semiconductor devices.
Latest Patents
Wakashima's latest patents include a substrate for use in a semiconductor package, a semiconductor package utilizing this substrate, and methods for manufacturing both the substrate and the semiconductor package. The substrate is fabricated by preparing a composite metal laminate consisting of a first metal layer, a second metal layer, and a carrier layer. The first metal layer has etching characteristics that differ from those of the second metal layer when exposed to the same etchant. This allows for the selective etching of the first metal layer until the second metal layer is exposed, forming pillar-like interconnections. The gaps between these interconnections are filled with resin to create a resin base with interconnections. The carrier layer is then removed, and the second metal layer is selectively etched to expose either the first metal layer or the resin base, resulting in a conductive pattern on the resin base. Additionally, his semiconductor device fabrication process involves an encapsulation step using vacuum pressure differential printing with a liquid resin encapsulant.
Career Highlights
Throughout his career, Yoshiaki Wakashima has worked with notable companies such as Hitachi, Ltd. and Hitachi Tobu Semiconductor. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in semiconductor technology.
Collaborations
Wakashima has collaborated with esteemed colleagues, including Masayuki Watanabe and Toshio Sugano. Their combined expertise has fostered innovation and development in their respective fields.
Conclusion
Yoshiaki Wakashima's contributions to semiconductor technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence the future of semiconductor manufacturing and design.