Patent ID: 8334158

Claim:
A method for manufacturing a sensor device including a sensor chip having a sensing portion on a surface thereof, the sensing portion being configured to be displaced when mechanical quantity is applied to the sensing portion to detect the mechanical quantity based on the displacement, comprising: mounting the sensor chip on a first surface of a substrate; arranging a resin having at least one of a volatile property and a foamable property on the sensor chip, thereby covering the sensor chip; sealing the sensor chip covered by the resin and the substrate by a sealing member on the first surface of the substrate, such that a surface of the sensor chip on an opposite side from the first surface of the substrate is exposed, after the covering of the sensor chip; and curing the sealing member, and heating the resin to be vaporized or foamed after the sealing of the sensor chip and the substrate so that a void is formed between a covered portion in the sensor chip, which is covered by the sealing member, and the sealing member, wherein in the sealing by the sealing member, a part of the sensor chip is used as an unsealed portion that is not sealed by the sealing member, and the sensor chip and the substrate are sealed such that the resin communicates with an outside via the unsealed portion, after the sealing, the void is formed by discharge of the vaporized or foamed resin from the unsealed portion when the resin is heated, the unsealed portion serves as the sensing portion of the sensor chip, and in the arranging of the resin, the resin is arranged on the sensor chip such that the sensing portion is exposed to the outside from the resin.