Semiconductor apparatus with electrically insulated heat sink
AssigneeRobert Bosch GmbH
InventorIstvan Ragaly
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Abstract
A semiconductor element, either a diode or a controlled rectifier, is electrically insulated relative to the heat sink on which it is mounted by either an insulating layer or an insulating diode of high thermal conductivity. A single unit including the heat sink with a plurality of diodes is used as a bridge rectifier in single phase or polyphase circuits.
Claims24
In a semiconductor arrangement having a single metallic base member (11) constituting a heat sink, a plurality of first semiconductor elements (13) mounted on said single metallic base member and electrical conductor means connected to at least one of said semiconductor elements for providing electrical contact thereto, the improvement comprising
- electrical insulator means (19) having a high thermal conductivity interposed between said first semiconductor elements and said metallic base member for electrically insulating said single metallic base member from said semiconductor elements, said electrical insulator means comprising a plurality of second semiconductor elements connected to said first semiconductor elements, said second semiconductor elements being always in the blocked state.
In an AC generator having a plurality of AC terminals for furnishing an AC signal, a rectifier arrangement comprising a plurality of first button diodes (102) connected to said AC terminals (104) for rectifying said AC signal;
- support means (106) for supporting said first button diodes within said generator said support means also constituting a heat sink;
- and insulating means (103) comprising a plurality of second button diodes interconnected between said first button diodes and said support means for conducting heat from said first button diodes to said support means while electrically insulating said first button diodes from said support means.
Dependencies are inferred from the claim text.