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Electrode Arrangement for Thermal Printhead Used With Resistive Ribbon

IP.com Disclosure Number: IPCOM000060611D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Anderson, CW: AUTHOR

Abstract

A thermal printhead for resistive ribbon printing has its electrodes arranged with the edges of each electrode slante eliminate the lack of ink transfer from the ribbon to the paper in the spaces between the electrodes.

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Electrode Arrangement for Thermal Printhead Used With Resistive Ribbon

A thermal printhead for resistive ribbon printing has its electrodes arranged with the edges of each electrode slante eliminate the lack of ink transfer from the ribbon to the paper in the spaces between the electrodes.

A thermal printhead 1 includes a substrate 2 having electrodes 3 etched thereon with their contact pads (not shown) al etched thereon. The printhead 1 has an overlay 4, which may be considered another substrate, with electrodes 5 etched thereon along with their contact pads (not shown). The substrate 2 and the overlay 4 are laminated together by a high-dielectric- strength film adhesive
7. The substrate 2 and overlay 4 are pressed together on film 7 with heat and pressure. The film 7 remains continuous so as to prevent electrical contact between the electrodes 3 and 5. The final printhead 1 has the electrodes 5 disposed between the electrodes 3.

Each of the electrodes 3 and 5 has its edges slanted rather than being perpendicular to the substrate 2 and the overlay 4. This results in the electrodes 3 and 5 having a close fit with each other to eliminate the lack of ink transfer in the space between the electrodes 3 and 5 as occurs when all of the electrodes 3 and 5 are formed on the substrate 2, for example, wi their edges substantially perpendicular to the substrate 2.

Disclosed anonymously.

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