Electret Device
AssigneeKabushiki Kaisha Saginomiya Seisakusho
InventorsKazunori Ishibashi, Takuma Ishiguro, Hiroyuki Mitsuya
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Abstract
Provided is a long-life electret device preventing charge degradation of an electret element sealed in a closed space. The provided electret device includes a package member; a lid member; and an electret element. The lid member seals the package member to thereby form a closed space, the electret element is placed in the closed space, and a hydrogen getter is included in at least part of an inside of the closed space.
Claims20
1-15. (canceled)
An electret device comprising:
- a package member;
- a lid member;
- and
- an electret element, wherein
- the lid member seals the package member to thereby form a closed space,
- the electret element is placed in the closed space, and
- a hydrogen getter is included in at least part of an inside of the closed space.
A method of manufacturing an electret device including a package member, a lid member, and an electret element, the method comprising:
- a step of preparing the package member;
- a step of placing the electret element in the package member;
- and
- a step of sealing the package member with the lid member to thereby form a closed space, wherein
- the method comprising a step of providing a hydrogen getter on at least part of the package member or the lid member forming an inner wall of the closed space or the electret element before the sealing step.
Dependencies are inferred from the claim text.