To provide a substrate for suspension that is capable of improving reliability of electrical connection with an actuator element.
A substrate for suspension 1 according to the invention comprises an insulation layer 10, a metal support layer 11 and a wiring layer 12. Among these layers, the wiring layer 12 includes: multiple lines 13; and a wiring connection part 16 that is connected to the corresponding line 13 and is electrically connected to an actuator element 44 through a conductive adhesive. A connection structure region 3 includes a metal support layer through-hole 32 and an insulation layer through-hole 33, and is at least partially provided with an injection hole 31 where the conductive adhesive is injected. The metal support layer 11 includes a frame body part 17 that forms the metal support layer through-hole 32. The frame body part 17 includes an opposing face 17c that is arranged on a surface opposite to the insulation layer 10 and is opposed to the actuator element 44, and the opposing surface 17c of the frame body part 17 is provided with a groove 18.
Hiroyuki Nagai
Katsuomi Isogai
Yukihiro Hotta
Kazuya Yamashita