Patent ID: 8033009

Claim:
A method for producing a force sensor comprising a force sensor chip with strain resistive elements for detecting a transmitted external force; and an attenuator for fixing the force sensor chip, attenuating the external force and transmitting the attenuated external force to the force sensor chip, in which the force sensor chip and the attenuator are joined at joint portions with a glass layer sandwiched therebetween, the method comprising: forming a glass film as the glass layer between the attenuator and the force sensor chip at the joint portions; and performing anodic bonding by stacking the force sensor chip including the glass film formed thereon and the attenuator as a stacked body in close contact with each other at the joint portions, and applying a voltage to the stacked body with a first voltage on a force sensor chip side and a second voltage on an attenuator side, to join the glass film and the attenuator, wherein the force sensor chip comprises an action portion to which the external force is transmitted, a connecting portion which is adjacent to the action portion and on which the strain resistive elements are disposed at specific positions, and a support portion for supporting the action portion and the connecting portion, wherein the attenuator comprises an input portion to which the external force is input, a fixing portion for fixing the force sensor chip, and a transmission portion for attenuating the external force and transmitting the attenuated external force to the action portion, and the joint portions are provided at positions between the action portion and the transmission portion, and between the support portion and the fixing portion.