Thermal head with protective layer

Details Thermal head with protective layer Thermal head with protective layer

2011-08-30

2011-08-30

Meier, Stephen (Department: 2853)

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

C029S611000

Reexamination Certificate

active

08009185

ABSTRACT:
A thermal head (A) according to the present invention includes a substrate (1) on which a heat-producing resistor (5), a common electrode (3) and individual electrodes (4) for energizing the heat-producing resistor (5), and a protective layer (6) having a double-layer structure and formed on the heat-producing resistor (5) to cover at least the heat-producing resistor are provided. A second protective layer (6B) constituting the upper layer of the protective layer (6) is conductive, and a first protective layer (6A) constituting the lower layer of the protective layer (6) has thickness (t1) which is not less than three times the thickness (t2) of the second protective layer (6B).

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International Search Report for corresponding International Application PCT/JP2005/010784, mailed Sep. 13, 2005.

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