CIRCUIT DEVICE
First Claim
1. A circuit device, comprising:
- a case member;
a first circuit board and a second circuit board fitted into the case member and arranged in a way that the first circuit board is overlaid with the second circuit board;
a first circuit element fixedly secured to a principal surface of the first circuit board; and
a second circuit element fixedly secured to a principal surface of the second circuit board;
whereinthe first circuit element fixedly secured to the first circuit board is sealed with a sealing resin, the case member is provided therein with a hollow portion which is not filled with the sealing resin.
8 Assignments
0 Petitions
Accused Products
Abstract
Provided is a circuit device capable of increasing the packaging density and preventing the thermal interference between circuit elements to be incorporated. In a hybrid integrated circuit device, a first circuit board and a second circuit board are fitted into a case member in a way that the first circuit board is overlaid with the second circuit board. A first circuit element is arranged on the upper surface of the first circuit board and a second circuit element is arranged on the upper surface of the second circuit board. Furthermore, inside the case member, provided is a hollow portion that is not filled with a sealing resin. Such a configuration prevents the second circuit element, which is a microcomputer, from operating unstably due to a heat generated in the first circuit element, which is a power transistor, for example.
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Citations
4 Claims
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1. A circuit device, comprising:
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a case member; a first circuit board and a second circuit board fitted into the case member and arranged in a way that the first circuit board is overlaid with the second circuit board; a first circuit element fixedly secured to a principal surface of the first circuit board; and a second circuit element fixedly secured to a principal surface of the second circuit board;
whereinthe first circuit element fixedly secured to the first circuit board is sealed with a sealing resin, the case member is provided therein with a hollow portion which is not filled with the sealing resin.
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2. A circuit device, comprising:
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a case member; a first circuit board and a second circuit board fitted into the case member and arranged in a way that the first circuit board is overlaid with the second circuit board; a first circuit element, which is a power transistor, fixedly secured to a principal surface of the first circuit board; a second circuit element which is fixedly secured to a principal surface of the second circuit board and controls an operation of the first circuit element; a first sealing resin sealing the first circuit element in the case member, the first circuit element being fixedly secured to the first circuit board; and a second sealing resin covering the second circuit element which is fixedly secured to the second circuit board, wherein the case member is provided therein with a hollow portion which is not filled with the first sealing resin. - View Dependent Claims (3, 4)
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Specification