Other

Hirokazu Kawamura

Tatsuo Kataoka

Katsuhiko Hayashi

Akira Ichiryu

Masahito Ishii

A 2-metal layer TAB and a both-sided CSP.BGA tape having an insulating substrate and a wiring layer provided on at least both sides of the substrate, the substrate having evenly spaced sprocket holes on both width direction edges in the longitudinal direction thereof and also having through-holes formed with a punching press, and the through-holes being filled with a conductor by means of a punching press such that the conductor and the wiring layers are electrically connected, which is characterized by having round pilot holes between the sprocket holes formed in the longitudinal direction thereof; and a process of producing the same.

Growing community of inventors

Ageo, Japan

Hirokazu Kawamura