Patent ID: 11915924
Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 6:
7. A semiconductor device having a space therein, comprising:
a support layer made of silicon;
an activation layer made of silicon, having an element portion, and bonded to the support layer via a first silicon oxide film layer; and
a cap portion made of silicon, bonded to the activation layer via a second silicon oxide film layer, and having a recess disposed at a position corresponding to the element portion, wherein:
the support layer, the first silicon oxide film layer, the activation layer, the second silicon oxide film layer, and the cap portion provide a stacking structure, and the recess provides the space inside the stacking structure, the semiconductor device further comprising:
a gas discharge passage only arranged in one of the first silicon oxide film layer sandwiched between the support layer and the activation layer and the second silicon oxide film layer sandwiched between the activation layer and the cap portion, surrounding the space, and reaching an outer periphery of the activation layer, wherein:
the recess includes a plurality of recess portions;
the gas discharge passage surrounds an outer periphery of each recess portion when viewing from a top view; and
a part of the gas discharge passage surrounding one recess portion is connected to another part of the gas discharge passage surrounding an adjacent one recess portion.