| abstract |
To provide a connection structure having improved joint life and excellent reliability by preventing generation of cracks or peeling. Provided is a connection structure in which a object to be connected (C) is joined onto a object to be connected (B) by a porous metal layer (A) which is a connector, in which a porosity of the porous metal layer (A) is from 2 volume% to 38 volume%, the porous metal layer (A) includes an approximately ellipsoidal hole (h), an average circularity of an ellipsoidal shape of the hole (h) in a cross section (V) of the porous metal layer (A) in a thickness direction is from 0.80 to 0.90, an average value of inclination angles of a long axis of an ellipsoidal shape of the hole (h) with respect to the normal to the thickness direction of the cross section (V) is equal to or smaller than 57 degrees, and an average long axis length of the ellipsoidal shape of the hole (h) in the cross section (V) is from 30 nm to 500 nm. |