Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-03-18
1996-03-12
Vo, Peter
Metal working
Method of mechanical manufacture
Electrical device making
29843, 29844, 174263, 174265, 228254, 439 83, 439 84, H05K 336, H05K 340, H05K 346, H01R 909
Patent
active
054975450
ABSTRACT:
A multi-layer wiring assembly including a stack of insulating layers, e.g. of polyimide, alternating with wiring patterns, typically of copper. To establish the circuit pattern, successive wiring patterns are connected to one another through the intervening insulating layers at predetermined locations, by metal stud connections. The studs are formed during assembly of the stack by wire-bonding a stud onto an underlying wiring pattern through a through-hole of the insulating layer above, and then stamping the exposed end of the wire-bonded stud to spread it into contact with the uppermost wiring pattern. The wire-bonded studs e.g. of Au, form strong bonds with the underlying conductor and are quick to apply in an automated process using a wire-bonding machine.
REFERENCES:
patent: 2990533 (1961-06-01), Hughes et al.
patent: 3103547 (1963-09-01), Ansley
patent: 3201851 (1965-08-01), Stearns
patent: 3281923 (1966-11-01), Best et al.
patent: 3445929 (1969-05-01), Wolf
patent: 3446908 (1969-05-01), Tally et al.
patent: 3926360 (1975-12-01), Moister, Jr.
patent: 4727633 (1988-03-01), Herrick
patent: 4730086 (1988-03-01), Kanijo et al.
patent: 4881906 (1989-11-01), Mackanic et al.
patent: 5024372 (1991-06-01), Altman et al.
IBM Technical Disclosure Bulletin, vol. 21, No. 12, May 1979, pp. 4798-4799.
Bachmann "Excimer Lasers . . . Circuit Board" Chemtronics, vol. 4, Sep. 1989, pp. 149-152.
IBM Technical Disclosure Bulletin, vol. 15, No. 8, Jan. 1973, p. 2492.
Miura Osamu
Miyazaki Kunio
Ookoshi Yukio
Takahashi Akio
Watanabe Ryuji
Hitachi , Ltd.
Vo Peter
LandOfFree
Method of making electrical connections in the manufacture of wi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making electrical connections in the manufacture of wi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making electrical connections in the manufacture of wi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2092802