Electronic unit and method for manufacturing an electronic unit
First Claim
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1. An electronic unit, comprising:
- a printed circuit board having a central region populated with electronic components on both sides thereof, and an edge region adjoining said central region;
a housing enclosing said printed circuit board, said housing having a housing floor and a housing cover connected to said housing floor, said housing floor formed with a first surface having an outer region, a continuous wall surrounding said outer region of said first surface, and a raised second surface being raised with respect to said first surface, said wall extending from said first surface to said raised second surface, said first surface extending in a first direction from said continuous wall, said raised second surface extending in a second direction from said continuous wall, said second direction being opposite the first direction;
said central region of said printed circuit board being disposed spaced apart from said housing and said edge region being connected to said raised second surface of said housing floor via a heat-conducting adhesive layer;
said housing cover having an edge formed with an annularly continuous projection engaging into a corresponding groove formed in said raised second surface of said housing floor, said projection and said groove together forming a groove-and-projection connection and being glued to one another.
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Abstract
An electronic unit, in particular a control device for a motor vehicle, has a printed circuit board, populated with electronic components, and a housing enclosing the printed circuit board. The printed circuit board has at least one first section, arranged at a distance from the housing and equipped with electronic components on both sides thereof, and at least one second section which is connected to the housing by way of a heat-conducting adhesive layer.
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Citations
14 Claims
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1. An electronic unit, comprising:
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a printed circuit board having a central region populated with electronic components on both sides thereof, and an edge region adjoining said central region; a housing enclosing said printed circuit board, said housing having a housing floor and a housing cover connected to said housing floor, said housing floor formed with a first surface having an outer region, a continuous wall surrounding said outer region of said first surface, and a raised second surface being raised with respect to said first surface, said wall extending from said first surface to said raised second surface, said first surface extending in a first direction from said continuous wall, said raised second surface extending in a second direction from said continuous wall, said second direction being opposite the first direction; said central region of said printed circuit board being disposed spaced apart from said housing and said edge region being connected to said raised second surface of said housing floor via a heat-conducting adhesive layer; said housing cover having an edge formed with an annularly continuous projection engaging into a corresponding groove formed in said raised second surface of said housing floor, said projection and said groove together forming a groove-and-projection connection and being glued to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for manufacturing an electronic unit, which comprises the following steps:
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a) providing a printed circuit board with at least one first printed circuit board section in a central area thereof, being populated on both sides with electronic components, and having at least one second printed circuit board section arranged at an edge of the printed circuit board and having one side not populated with electronic components; b) providing a contoured housing floor formed with a first surface having an outer region, a continuous wall surrounding the outer region of the first surface, and a raised second surface being raised with respect to the first surface, the wall extending from the first surface to the raised second surface, the raised second surface including an edge region having an annularly continuous groove formed therein, the first surface extending in a first direction from the continuous wall, the raised second surface extending in a second direction from the continuous wall, the second direction being opposite the first direction; c) depositing heat-conducting adhesive on the raised second surface; d) pressing on the printed circuit board in order to bond the printed circuit board on the raised second surface of the housing floor; e) providing a housing cover having a projection configured to mate in annularly continuous circumferential engagement with the groove of the raised second surface of the housing floor, pressing the housing cover onto the housing floor with adhesive disposed to create a glued groove-and-projection connection between housing floor and housing cover. - View Dependent Claims (12, 13, 14)
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Specification