Browse Prior Art Database

Document Reader and Printer

IP.com Disclosure Number: IPCOM000081125D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Wu, LL: AUTHOR

Abstract

This is a copier which is fabricated entirely within a monolithic integrated circuit chip. The chip comprises a set of thermal printer elements, a set of optical sensors and registers which interface the printer elements and optical sensors.

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Document Reader and Printer

This is a copier which is fabricated entirely within a monolithic integrated circuit chip. The chip comprises a set of thermal printer elements, a set of optical sensors and registers which interface the printer elements and optical sensors.

As illustrated in Figs. 1 and 2, chip 1 is mounted on ceramic substrate 3 by an epoxy 5. A window in substrate 3 allows the optical image to be sensed by sensor 2. Thermal printer heating elements 6 surrounded by epoxy 7 activate thermally sensitive paper which moves past the elements. Bonding pads 8 serve to interconnect the chip with external circuits.

Chip 1 may be fabricated with either bipolar or metal-oxide semiconductor (MOS) technology. The optical sensors are preferably reverse biased junctions functioning as light integrators. Registry circuitry 4 is preferably a one stage, two phase shift register and two drivers. The shift register, drivers and printing element circuits may be of standard design.

The above system is simple and compact. In addition, the paper advance roller is the only mechanical device needed.

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