Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With provision for cooling the housing or its contents
Reexamination Certificate
2006-09-12
2006-09-12
Coleman, W. David (Department: 2823)
Active solid-state devices (e.g., transistors, solid-state diode
Housing or package
With provision for cooling the housing or its contents
C257S719000, C257SE23109
Reexamination Certificate
active
07105922
ABSTRACT:
The invention relates to a method of manufacturing a semiconductor device (10), wherein a semiconductor element (1) provided with a number of connection regions (2) is fitted between a first, electroconductive plate (3) and a second plate (4), wherein two connection conductors (3A,3B) are formed, from the first plate (3), for the two connection regions (2A,2B) of the element (1), wherein a passivating encapsulation (5) is provided between the plates (3, 4) and around the element (1), and wherein the device (10) is formed by applying a mechanical separating technique in two mutually perpendicular directions (L, M).In a method according to the invention, the connection conductors (3A,3B) are formed by providing a mask (6) on the first conducting plate (3) in such a manner that a part (3C) of the plate (3) situated between the connection regions (2A,2B) remains exposed, which part is subsequently removed by etching. Such a method enables a very compact discrete or at least semi-discrete semiconductor device (10) to be readily obtained at low cost, while a high yield is achieved. In a preferred embodiment, also further parts (3D) of the conducting plate (3) situated at the location where the device (10) is to be sawn, cut or broken remain uncovered by the mask (6) and are removed during etching.
REFERENCES:
patent: 6602737 (2003-08-01), Wu
patent: 6625026 (2003-09-01), Boudreaux et al.
patent: 6946730 (2005-09-01), Teshima
patent: 0920058 (1999-06-01), None
patent: A09027591 (1997-01-01), None
De Samber Marc Andre
Dijken Durandus Kornelius
Weekamp Johannus Wilhelmus
Koninklijke Philips Electronics , N.V.
Waxler Aaron
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