Electromagnetic wave shield case and a method for manufacturing electromagnetic wave shield case
First Claim
1. An electromagnetic wave shield case comprising:
- a shield case body configured to cover electronic parts on a circuit board; and
a flange formed integrally with said shield case body, wherein said shield case body and said flange are made of metallic material having a value of about 0.01 or more expressed by a fracture strength/elastic constant, and said flange is elastically deformed to be grounded to an grounding conduction portion on said circuit board to prevent a leakage of electromagnetic waves to outside of said electromagnetic wave shield case.
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Abstract
An objective of the present invention is to form a hyper-elastic flange integrally within a shield case body around a periphery thereof while decreasing an occupied area for grounding. The shield case 2 according to the present invention is disposed to cover electronic parts 6 on a circuit board 1, and which has a flange 7 formed integrally therewith so as to contact with a metallic ground line 3 on the circuit board 1. The flange 7 is elastically deformed to be grounded, thus a leakage of electromagnetic waves to the outside of the shield case 2 is prevented. The flange 7 is made of metallic glass. By forming the flange 7 from metallic glass, a displacement due to viscous flowing on the atomic level, which is different from a plastic deformation, can be utilized, and thus a high precision flange can be formed without a spring-back.
34 Citations
13 Claims
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1. An electromagnetic wave shield case comprising:
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a shield case body configured to cover electronic parts on a circuit board; and
a flange formed integrally with said shield case body, wherein said shield case body and said flange are made of metallic material having a value of about 0.01 or more expressed by a fracture strength/elastic constant, and said flange is elastically deformed to be grounded to an grounding conduction portion on said circuit board to prevent a leakage of electromagnetic waves to outside of said electromagnetic wave shield case. - View Dependent Claims (2, 3, 4)
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5. An electromagnetic wave shield case comprising:
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a shield case body configured to cover electronic parts on a circuit board; and
a flange formed integrally with said shield case body, wherein, said shield case body and said flange are made of metallic glass, and said flange is elastically deformed to be grounded to an grounding conduction portion on said circuit board to prevent a leakage of electromagnetic waves to outside of said electromagnetic wave shield case. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification