公开(公告)号：US20250018730A1

公开(公告)日：2025-01-16

申请号：US18756982

申请日：2024-06-27

Applicant: ROHM CO., LTD.

Inventor： Goro NAKATANI ,  Norihito JODAI

IPC: B41J2/335 ,  G03F7/30

Abstract: A thermal print head includes: a substrate; an insulating layer; a wiring layer; a resistor layer; and a protective layer. The substrate has a first surface and a second surface opposite to the first surface. A raised portion protruding toward a side opposite to the second surface and extending along a first direction in a plan view is formed on the first surface. The insulating layer is disposed on the first surface. The wiring layer is disposed on the insulating layer with the resistor layer interposed therebetween. The wiring layer has a bonding pad. A constituent material of the wiring layer is aluminum or an aluminum alloy. The protective layer is disposed on the insulating layer to cover the wiring layer. An opening that exposes the bonding pad is formed in the protective layer.