Metal working – Method of mechanical manufacture – Electrical device making
Patent
1998-05-06
2000-02-15
Young, Lee
Metal working
Method of mechanical manufacture
Electrical device making
29832, 29830, 29412, 29413, H05K 334
Patent
active
060238410
ABSTRACT:
The present invention relates to a manufacturing procedure for printed circuit boards. It is directed to those printed circuit boards which utilize one or more power devices. There is a printed circuit board having one or more removable regions, each removably joined thereto by means of a boundary which is perforated, scored, formed with a reduced material thickness, or otherwise rendered into a breakaway region. Each removable or breakaway region has one or more fixturing holes. There is a temporary fastener and a mating fastener for each of said fixturing holes, one or more power devices, and at least one heat sink having a mounting hole for each of said fixturing holes. The position of each mounting hole on said heat sink is related to the position of a corresponding fixturing hole on a removable region of said printed circuit board. Thus, when a power device is affixed to a removable region, the mounting hole of said power device will align with the respective mounting hole of the heat sink. Upon completion of relevant board processing, the temporary fastener or fasteners and the mating fastener or fasteners are removed and said removable region or regions are separated from the printed circuit board by means of fracture, with the power device or devices remaining attached to the board, whereupon a permanent fastener affixes each power device to said heat sink by engaging the respective mounting hole.
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patent: 4328613 (1982-05-01), Kirkpatrick
patent: 4673772 (1987-06-01), Satoh et al.
patent: 4841630 (1989-06-01), Lubranski et al.
patent: 5093282 (1992-03-01), Ohno et al.
patent: 5386338 (1995-01-01), Jordan et al.
Smith Sean
Young Lee
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