Inventor

KAWAKAMI YOJI

JP3 patents

Patents

3 patents

US5687901ANov 18, 1997

Process and apparatus for forming ball bumps

NIPPON STEEL CORP54 citations93

US5857610AJan 12, 1999

Process and apparatus for forming ball bumps

NIPPON STEEL CORP22 citations89

US5803339ASep 8, 1998

Process and apparatus for forming ball bumps

NIPPON STEEL CORP9 citations71