LIQUID DISCHARGE HEAD AND MANUFACTURING METHOD OF THE SAME

To suppress generation of dielectric breakdown caused by static electricity inflow to an element substrate of a liquid discharge head.SOLUTION: A liquid discharge head includes: a plurality of element substrates having a first element substrate and a second element substrate each of which has a heating element array in which a plurality of heating elements for generating thermal energy for liquid discharge by energization are arrayed, a conductive protective layer which covers the plurality of heating elements, an insulation layer which is arranged between the plurality of heating elements and the conductive protective layer, and an external connection terminal for connecting with an external; and an electric wiring substrate which is electrically connected to the first element substrate and the second element substrate respectively through the external connection terminal. In each of the first element substrate and the second element substrate, the external connection terminal includes a connection terminal for the conductive protective layer. The conductive protective layer is electrically connected to common wiring arranged on the electrical wiring substrate through the connection terminal.SELECTED DRAWING: Figure 2 【課題】液体吐出ヘッドの素子基板への静電気流入による絶縁破壊の発生を抑制する。【解決手段】通電によって液体吐出のための熱エネルギを発生する複数の発熱素子が配列された発熱素子列と、前記複数の発熱素子を覆う導電性保護層と、前記複数の発熱素子と前記導電性保護層との間に配された絶縁層と、外部との接続のための外部接続端子と、をそれぞれ有する第１の素子基板および第２の素子基板を含む複数の素子基板と、前記外部接続端子を介して前記第１の素子基板および前記第２の素子基板のそれぞれと電気接続された電気配線基板と、を含む液体吐出ヘッドであって、前記第１の素子基板および前記第２の素子基板のそれぞれにおいて、前記外部接続端子は、前記導電性保護層用の接続端子を含み、前記導電性保護層は、前記接続端子を介して前記電気配線基板に設けられた共通配線に電気的に接続されている液体吐出ヘッド。【選択図】図２