Protective structure for electronic parts of printing head

Abstract

Abstract PURPOSE:To certainly protect electronic parts, to facilitate the control of a seal material and to also suitably avoid the deformation of a substrate or lead wire by indivisually covering the respective electronic parts provided on the substrate of a printing head is parallel with a seal material. CONSTITUTION:Resistance heating parts 5 consisting of a large number of heating resistors are provided to the upper end part of an alumina substrate 2 in the vicinity of the free end part thereof so as to extend in a left-and-right direction and driver ICs 6 for selectively driving a large number of heating resistors to generate heat are provided in the vicinity of the close contact part 9 with the resin substrate 3 on the alumina substrate 2 so as to extend in parallel to the extending direction of the resistance heating parts 5. Indivisual electrodes 7 are arranged between the respective resistance heating parts 5 and the respective corresponding driver ICs 6 and connected to the driver ICs 6 by lead wires 10 and one terminal parts of the wirings 18 connected to an external circuit are also connected to said ICs 6 by lead wires 11. The respective driver ICs 6 are indivisually covered with a seal material 12 composed of an epoxy resin.

Inventors

• 👤 Masataka Kishi
• 👤 岸　正隆

Bibliographic Details