Electrochromic display device and method of manufacture

Details Electrochromic display device and method of manufacture Electrochromic display device and method of manufacture

1978-07-12

1981-07-28

Davie, James W.

29570, G02F 117

Patent

active

042807549

ABSTRACT:
An electrochromic display device and method of manufacture is disclosed wherein electrochromic material is deposited in a single layer on a single film of conductive material over the whole area of glass substrate and then the electrochromic material and conductive material are successively etched through a single mask which defines a display segment pattern and remains in position throughout the whole etching process, whereby etched edge portions of the different materials are in excellent alignment and there is therefore small plate area for a reverse emf cell and good display device performance is achieved. The electrochromic material may be etched by the solution employed for developing the photoresist, whereby an etching process step is eliminated.

REFERENCES:
patent: 3836229 (1974-09-01), Saurer
patent: 3981560 (1976-09-01), Heyman et al.
patent: 4086003 (1978-04-01), Kouchi et al.
patent: 4188095 (1980-02-01), Nishimura et al.

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