Metal working – Method of mechanical manufacture – Electrical device making
Patent
1980-01-16
1981-12-15
Husar, Francis S.
Metal working
Method of mechanical manufacture
Electrical device making
29588, 29846, 156242, H05K 330
Patent
active
043052045
ABSTRACT:
An alpha-numeric display device having a modular structure for placement side-by-side in vertical and horizontal formats to present symbols, words and phrases. The device functions as a stand-alone peripheral, appearing to a controller, such as a microprocessing device, as a random access memory. In particular, the device is operative to receive a standarized 7-bit ASCII code and to translate it to a multiple segment display whereby it can be continuously presented. The device provides a small, relatively low-cost alphabet and number display with a built-in electronic interface to a microprocessing unit permitting word communication to be incorporated into compact equipment, such as hand-held terminals and portable display devices. Complex interface circuitry is compactly packaged in a modular device by utilization of hybrid integrated circuit technology in which a multiple layer substrate provides interconnection between display units and semiconductor integrated circuit chips on opposing sides of the substrate. A multiple step PTF silkscreen printing process permits construction of a two-sided, compact display device with extremely thin, high resolution printed interconnections. The critical steps are the partial curing of a first application PTF dielectric composition followed by a second accurate application of PTF composition and subsequent curing thereof.
REFERENCES:
patent: 3616003 (1971-10-01), Kohashi et al.
patent: 3622419 (1971-11-01), London et al.
patent: 3922388 (1975-11-01), Schebalin
patent: 4163072 (1979-07-01), Soos
IBM Tech. Discl. Bull. vol. 12, No. 4, Sep. 1969, p. 594 by Pirog.
Herendeen Robert O.
Kingsbury Richard F.
Toggart Victor J.
Arbes C. J.
Husar Francis S.
Litronix, Inc.
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