Acceleration sensor having single and multi-layer substrates
First Claim
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1. An acceleration sensor comprising:
- a first substrate;
a second substrate consisting of a first layer that is the closest layer of said second substrate to said first substrate, said first layer having a first region and a second region, and a first surface that is opposed to said first substrate and one or more second layers formed on only the first region of said first layer, on a second surface of said first layer that is opposite said first surface; and
a sensor portion provided in a sealed cavity portion formed between said first substrate and said second substrate which are opposed to each other,wherein said second layers are formed above said sensor portion.
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Abstract
An acceleration sensor in accordance with an aspect of the present invention comprises a first substrate, a multilayer second substrate and a sensor portion. The multilayer second substrate is opposed to the first substrate. The multilayer second substrate is provided with an electrode drawing opening. Further, the multilayer second substrate consists of a plurality of layers. The sensor portion (a movable mass body and a fixed electrode) is provided in a sealed cavity portion which is formed between the first substrate and the multilayer second substrate which are opposed to each other.
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Citations
4 Claims
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1. An acceleration sensor comprising:
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a first substrate; a second substrate consisting of a first layer that is the closest layer of said second substrate to said first substrate, said first layer having a first region and a second region, and a first surface that is opposed to said first substrate and one or more second layers formed on only the first region of said first layer, on a second surface of said first layer that is opposite said first surface; and a sensor portion provided in a sealed cavity portion formed between said first substrate and said second substrate which are opposed to each other, wherein said second layers are formed above said sensor portion. - View Dependent Claims (2, 3, 4)
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Specification