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Method for the production of a sealed housing for a disk shaped semiconductor body which exhibits at least one pn-transition
| Details |
Inventors: Eisele, Dieter;
Assignee: BBC Brown, Boveri & Company, Limited (Baden, CH)
Primary Examiner: Rutledge; L. DeWayne
Assistant Examiner: Schiavelli; Alan E.
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
The invention concerns a method for the construction of a sealed disc cell housing for a disc shaped semiconductor body (1), which consists, essentially, of a hollow-cylindrical insulation housing (9) and two pressure contact bodies (4). The latter are provided with seal rings (12) comprising tubing sections of a plastic material which has been treated by electron irradiation and is expandable by heating. The contact bodies (4) are inserted into the insulation housing (9) and the seal ring (12) heated, whereby the wall thickness of the tubing sections (12) increases seal the gap between the pressure contact bodies (4) and the insulation housing (9). |
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DETAILED DESCRIPTION What is claimed as new and desired to be secured by Letters Patent of the United States is: 1.
A method for the production of a sealed housing for a disc shaped semiconductor body having at least one pn-transition, said method comprising the steps of: pressure contacting opposing axial surfaces of said semi-conductor body with electrode elements and contact bodies to form a thermally and electrically sealing axial housing for said semiconductor body; positioning a stretched elastic seal ring on the radial periphery of each said contact body, said seal ring comprising tubing sections formed of a material treated by electron irradiation and radially expandable by heating; inserting said axial housing into a hollow radial housing whose inner diameter defines a gap with respect to said seal rings; and heating said seal rings, whereby said seal rings radially expand to close said gap and form a sealed housing.
2.
The method of claim 1 wherein said step of positioning a stretched elastic seal comprises positioning a stretched elastic seal formed of synthetic caoutchouc.
Description:
The invention refers to a method for the production of a sealed housing for a disk-shaped semiconductor body exhibiting at least one pn-transition, which is capable of being pressure-contacted on each of its two main sides by way of electrode parts and a pressure contact body as housing enclosure, both thermally and electrically, whereby each pressure contact body is provided with an elastic seal ring.
This seal ring is employed in an insulating housing of a hollow cylindrical shape which encloses the semiconductor body.
It is intended for use for controllable power semiconductor elements.
The housing has a pass-through for control electrode connection.
The process finds application in the production of disc cell housings for controllable and non-controllable power semiconductor elements, whereby, in special cases, it is also possible to insert two semiconductor bodies after interposition of appropriate metallic discs between the pressure contact bodies, into the insulation housing
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