INKJET PRINT HEAD SUBSTRATE, METHOD FOR MANUFACTURING INKJET PRINT HEAD SUBSTRATE, INKJET PRINT HEAD, AND INKJET RECORDING APPARATUS

摘要

PROBLEM TO BE SOLVED: To enhance detection sensitivity of ink invasion to the periphery of an electrode pad part. SOLUTION: An inkjet print head substrate includes: a heat generating element configured to generate energy for ejecting ink; an electric wire 32 electrically connecting the heat generating element and an electrode lead provided on a flexible film wiring substrate; a protecting film 33 configured to protect the electric wire 32; an electrode pad 14 formed so as to provide an opening in the protecting film at a position above the electric wire 32 to connect the electrode lead; a region to which a sealing resin configured to protect an electrically connected portion of the electrode pad 14 and the electrode lead is to be applied; and an ink-detecting electrode 1 for detecting an ink in the region to be applied with the sealing resin. The ink-detecting electrode 1 is composed of a metal wire exposed from the protecting film 33. The metal wire has a smaller width than an opening provided in the protecting film 33 from which the metal wire is exposed. COPYRIGHT: (C)2010,JPO&INPIT