Title:
WIRING CIRCUIT BOARD WITH BUMPS AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2002111185
Kind Code:
A
Abstract:
To provide a wiring circuit board with bumps with which stable bump connection can be achieved and complicated operations such as pretreatment of plating is unnecessary.
An etching mask 7 for forming bumps is formed on a bump forming surface of a metal foil 3, having a thickness (t1+t2) obtained by adding the thickness t1 of a wiring circuit 1 can the height t2 of a bump 2 to be formed on the wiring circuit 1 and surface roughness of 0.2-20 μm. The bump 2 having an end surface with surface roughness of 0.2-20 μm is formed by half-etching the metal foil 3 from the side of the etching mask 7 for forming bumps to the depth corresponding to an expected bump height t2.
Inventors:
KANEDA YUTAKA
Application Number:
JP2000303745A
Publication Date:
April 12, 2002
Filing Date:
October 03, 2000
Export Citation:
Assignee:
SONY CHEMICALS
International Classes:
H01L23/498; H05K1/02; H05K3/06; H05K3/38; H05K3/34; H05K3/40; H05K3/46; (IPC1-7): H05K3/34; H05K1/02; H05K3/06; H05K3/38
Domestic Patent References:
JPH1154568A | 1999-02-26 | |||
JPH11340596A | 1999-12-10 | |||
JP2000177051A | 2000-06-27 |
Attorney, Agent or Firm:
Noboru Tajime (1 person outside)
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