BONDING MEMBER

摘要

A bonding member includes a protrusion that protrudes from a surface of a base and that has an end face adhering to a substrate with a surface force between the end face and the substrate. The protrusion has a varied modulus of elasticity and/or a varied Poisson's ratio so that G1a/Δγ1a≠G2a/Δγ2a is satisfied, where G1a denotes a strain-energy-release rate at a first release portion of the protrusion when a force is exerted on the protrusion in a first direction parallel to the surface, Δγ1a denotes an adhesive energy at the first release portion, G2a denotes a strain-energy-release rate at a second release portion of the protrusion when a force having the same magnitude as the force exerted in the first direction is exerted on the protrusion in a second direction opposite to the first direction, and Δγ2a denotes an adhesive energy at the second release portion.

主权项

1. A bonding member, comprising:
a base; and a protrusion that protrudes from a surface of the base and that has an end face that adheres to a substrate with a surface force between the end face and the substrate, wherein the protrusion has a varied modulus of elasticity and/or a varied Poisson's ratio so that a relationship G1a/Δγ1a≠G2a/Δγ2a is satisfied, where G1a denotes a strain-energy-release rate at a first release portion of the protrusion when a force is exerted on the protrusion in a first direction parallel to the surface, Δγ1a denotes an adhesive energy at the first release portion, G2a denotes a strain-energy-release rate at a second release portion of the protrusion when a force having the same magnitude as the force exerted in the first direction is exerted on the protrusion in a second direction opposite to the first direction, and Δγ2a denotes an adhesive energy at the second release portion.