Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-10-10
1991-11-19
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
1562755, 252512, H05K 336
Patent
active
050655051
ABSTRACT:
A method for connecting circuit boards in which a first circuit board having first electrodes is superposed on a second circuit board of which second electrodes are formed in positions corresponding to the first electrodes so that the first and second electrodes are electrically connected with each other, the method comprising a first step of applying a photocuring adhesive on the first electrodes and the residual regions of the first circuit board on which the first electrodes are not formed, a second step of irradiating light from a surface opposite to the surface of the first circuit board on which the first electrodes are formed to cure the photocuring adhesive on the residual regions of the first circuit board on which the first electrodes are not formed, a third step of adhering particles which are conductive at least on outer peripheral surfaces to the first electrodes by means of the uncured photocuring adhesive, and a fourth step of superposing the first circuit board to which the particles are adhered on the second circuit board to electrically connect the first and second electrodes with each other through the particles, provided that the first electrodes are opaque and the first circuit board is light-transmissive.
REFERENCES:
patent: 4157407 (1979-06-01), Peiffer
patent: 4744850 (1988-05-01), Imano et al.
patent: 4780371 (1988-10-01), Joseph et al.
patent: 4859268 (1989-08-01), Joseph et al.
Japanese Published Unexamined Patent Application (No. HEI1 (1989)-227,444, and English abstract thereof.
Matsubara Hiroshi
Nukii Takashi
Arbes Carl J.
Asher Robert M.
Conlin David G.
Sharp Kabushiki Kaisha
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