Shinichiro Iwanaga

Title: Shinichiro Iwanaga: Innovator in Electrode Pad Technology

Introduction

Shinichiro Iwanaga is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of electrode pad technology, holding a total of 3 patents. His innovative approaches have paved the way for advancements in wiring board manufacturing.

Latest Patents

Iwanaga's latest patents include a method for forming bumps on electrode pads using a double-layered film. This process involves several steps: first, a laminated two-layer film is formed on the wiring board, with apertures corresponding to the electrode pads. The lower layer contains an alkali-soluble radiation-nonsensitive resin composition, while the upper layer consists of a negative radiation-sensitive resin composition. Next, a low-melting metal is filled into the aperture pattern, which is then reflowed by pressing or heating to create bumps. Finally, the laminated two-layer film is peeled and removed from the board. This innovative method allows for high resolution and easy peeling, enhancing the efficiency of the manufacturing process.

Another notable patent is a radiation-sensitive resin composition that includes a copolymer with recurring units and a radiation-sensitive acid-generator. This composition boasts excellent storage stability, and the resulting resist is a chemically amplifiable type sensitive to artificial ultraviolet rays. The resist demonstrates high transparency to radiations and excels in essential physical properties such as durability to dry etching, sensitivity, resolution, and pattern configuration.

Career Highlights

Shinichiro Iwanaga is currently associated with JSR Corporation, where he continues to develop cutting-edge technologies. His work has significantly impacted the electronics industry, particularly in the production of wiring boards.

Collaborations

Iwanaga has collaborated with notable colleagues, including Noboru Yamahara and Kiyoshi Murata. Their combined expertise has contributed to the success of various projects and innovations.

Conclusion

Shinichiro Iwanaga's contributions to electrode pad technology and his innovative patents have established him as a key figure in the field. His work continues to influence advancements in manufacturing processes, showcasing the importance of innovation in technology.