Claims
- 1. A hermetic case for encasing an electronic circuit board having an electronic element thereon, comprising:
- a case body for defining a hermetically sealed space for mounting said electronic circuit board therein;
- a vent hole formed in said case body for communicating said sealed space with ambient atmosphere; and
- cover means, attached to said case body, for protecting said electronic element from moisture and absorbing a pressure fluctuation of said sealed space,
- wherein said cover means comprises a flexible diaphragm sealingly attached to said case body around said vent hole.
- 2. An electronic circuit apparatus, comprising:
- a case body for defining a hermetically sealed space therein;
- a circuit board having an electronic component thereon and mounted to said case body in said sealed space;
- a vent hole formed in said case body for communicating said sealed space with ambient atmosphere; and
- cover means, attached to said case body, for protecting said electronic element from moisture and absorbing a pressure fluctuation of said sealed space,
- wherein said cover means comprises a flexible diaphragm sealingly attached to said case body around said vent hole.
- 3. A hermetic case for encasing an electronic circuit board having an electronic element thereon, comprising:
- a case body for defining a hermetically sealed space for mounting said electronic circuit board therein;
- a vent hole formed in said case body for communicating said sealed space with ambient atmosphere; and
- cover means, attached to said case body, for protecting said electronic element from moisture and absorbing a pressure fluctuation of said sealed space,
- wherein said case body comprises separate sections and said cover means comprises a flexible sheet wrapping said electronic circuit board and clamped between said separate sections, and a fastener for sealingly clamping said flexible sheet between said separate sections of said case body.
- 4. An electronic circuit apparatus, comprising:
- a case body for defining a hermetically sealed space therein;
- a circuit board having an electronic component thereon and mounted to said case body in said sealed space;
- a vent hole formed in said case body for communicating said sealed space with ambient atmosphere; and
- cover means, attached to said case body, for protecting said electronic element from moisture and absorbing a pressure fluctuation of said sealed space,
- wherein said case body comprises separate sections and said cover means comprises a flexible sheet disposed around said electronic circuit board and clamped between said separate sections, and a fastener sealingly clamping said flexible sheet together with said electronic circuit board between said separate sections of said case body.
- 5. An electronic circuit apparatus, comprising:
- a case body for defining a hermetically sealed space therein;
- a circuit board having an electronic component thereon and mounted to said case body in said sealed space;
- a vent hole formed in said case body for communicating said sealed space with ambient atmosphere; and
- cover means, attached to said case body, for protecting said electronic element from moisture and absorbing a pressure fluctuation of said sealed space,
- wherein said cover means are disposed inside of said case body.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-038586 |
May 1991 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/277,305 filed Jul. 22, 1994, which is a continuation of application Ser. No. 08/124,857 filed Sep. 22, 1993, which is a continuation of application Ser. No. 07/889,432 filed May 28, 1992.
US Referenced Citations (8)
Foreign Referenced Citations (6)
Number |
Date |
Country |
3107694 |
Sep 1982 |
DEX |
3248715 |
Jul 1984 |
DEX |
3436300 |
May 1985 |
DEX |
3704287 |
Jun 1988 |
DEX |
124369 |
Aug 1989 |
JPX |
1580599 |
Jul 1990 |
SUX |
Non-Patent Literature Citations (1)
Entry |
IBM Technical Disclosure Bulletin, "Chip Joining Both Sides of Substrates Simultaneously", C. T. Rogers, vol. 13, No. 2, p. 396, Jul. 1970. |
Divisions (1)
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Number |
Date |
Country |
Parent |
277305 |
Jul 1994 |
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Continuations (2)
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Number |
Date |
Country |
Parent |
124857 |
Sep 1993 |
|
Parent |
889432 |
May 1992 |
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