Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1994-09-06
1996-01-02
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
361807, 361809, 361820, 174255, 206725, 220476, H05K 702
Patent
active
054814383
ABSTRACT:
Trays having the same size are piled up by fitting a downward extending edge frame formed on the whole periphery of the undersurface of each tray on the outer wall of the upward extending outer peripheral frame formed on the outer wall of the lower tray. The tray has multiple rectangular pockets defined by longitudinal and crosswise partition portions formed in a space defined by the inner wall of the outer peripheral frame. An upward projecting base is formed in the central portion of each pocket, for supporting the undersurface of a semiconductor device. Downward extending ribs are formed on the undersurface of each tray. Each rib surrounds upper side portions of the semiconductor device housed in the corresponding pocket of the lower tray and fitted on the inner wall of the inner wall of the lower tray. A first horizontal space D.sub.1 is defined between the outer peripheral frame and the edge frame, and a second horizontal space D.sub.2 is defined between the outer wall of the downward extending rib and the inner wall of the pocket in such a manner that D.sub.1 >D.sub.2.
REFERENCES:
patent: 5080228 (1992-01-01), Maston, III et al.
patent: 5263583 (1993-11-01), Ohashi
patent: 5314068 (1994-05-01), Nakazato et al.
Picard Leo P.
Shinon Denkisangyo Kabushiki Kaisha
Whang Y.
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