| 摘要 |
A base member for an ink jet head, the base member comprising a substrate, a heat generating resistor provided between electrodes which constitute a pair on the substrate an upper protection layer provided on an insulation layer which in turn is provided on the heat generating resistor, the upper protection layer having a contact surface contactable to ink, the improvement residing in thatthe upper protection layer is made of amorphous alloy having a following composition formula:where 10 atomic %<=alpha<=30 atomic %, alpha+beta<80 atomic % alpha<beta, delta>gamma and, alpha+beta+gamma+delta=100 atomic %, and at least the contact surface of the upper protection layer contains an oxide of a constituent component.
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