Cooled electrical circuit component, particularly switching-type semiconductor

US4605986A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Willy Bentz · Sachsenheim, DE
• Willi Gansert · Kornwestheim, DE
• Gert Jakob · Stuttgart, DE
• Kurt Stammler · Schwieberdingen, DE
• Christoph Walter · Stuttgart, DE

Key dates

• Filing date: Dec 20, 1984
• Grant date: Aug 12, 1986
• Expiry date: Dec 20, 2004

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05K7/20509
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

To increase the heat capacity of a heat sink and heat dissipating structure combined with an electrical component, typically a transistor, for example of the TO 220 or SOT 93 type, a heat transferring base plate (3), with the interposition of an insulating, heat conducting foil (6), engages one flat surface of the element (11), and a second heat transferring element (17) is provided, pressed by a spring (24) against the other major surface, or a portion of the component (11). A plastic holder (7) is provided, attached to the base plate (3) for example by snap-in hooks (8), formed with openings to receive the component, and position the component against the base plate while, also, being formed with abutments to position the second heat transferring element which, for example, is block or plate-like. The spring, preferably, is a leaf spring having projecting arms extending, from both sides of a central portion (25), over two adjacently located components (11) and the second heat transferring elements (17) respectively, and engaging the holder (7) to form a subassembly therewith, the subassembly then being riveted, by rivets extending through the spring (24) to the base plate.