Thermal print head and method of making the same

Details Thermal print head and method of making the same Thermal print head and method of making the same

1995-11-20

1996-10-22

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

B41J 2335

Patent

active

055681760

ABSTRACT:
A thermal print head and method of creating the same, in which a metal film and a cooling compound are inserted between a resistance substrate and a cooling board. This construction can prevent the formation of air bubbles in the cooling compound between the resistance substrate and the cooling compound. This construction can also reduce local heat accumulation and thereby reduce uneven priming contrast since even if an air bubble is formed it will have a thickness less than the thickness of a double-sided tape that acts as an adhesive between the resistance substrate and the cooling board. In addition, a clearer image can be obtained even in the hi-speed priming because the metal film having a thermal conductivity higher than that of the cooling compound is inserted inside the cooling compound. This increases the overall thermal conductivity between the resistance substrate and the cooling board and thus improves heat dissipation within the system.

REFERENCES:
patent: 4837586 (1989-06-01), Brownstein
patent: 5252988 (1993-10-01), Katayama et al.
patent: 5285216 (1994-02-01), Ota et al.

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