Electrochromic indicator device assembled with an adhesion promo

Details Electrochromic indicator device assembled with an adhesion promo Electrochromic indicator device assembled with an adhesion promo

1983-03-22

1985-12-17

Corbin, John K.

G02F 123

Patent

active

045589240

ABSTRACT:
To assure a durable bonded joint between the two substrates on which the respective electrodes of an electrochromic device are joined together by an adhesive to form a cavity between them for an electrolyte, a baked-on layer of polyvinyl alcohol or polyvinyl butyral is provided to promote adhesion, allowing a commercially available two-component adhesive to provide a firm joint even if the non-transparent substrate is of metal. The adhesion promoting coating is also used to line the cavity, except where the electrodes are, thus providing insulation and chemical isolation which is important, at least for the metal substrate. The electrolyte is filled through a hole in the metal substrate, which is thereafter plugged with a low-melting solder. The metal foil of a circuit board can be used to provide the rear portions of a number of electrochromic indicators fitting against a common glass plate if cut-outs are provided in the circuit board into which the metal can be deformed to provide the necessary electrolyte cavities.

REFERENCES:
patent: 4278736 (1981-07-01), Kamerling
patent: 4396253 (1983-08-01), Kuwagaki et al.

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