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Browse Prior Art Database

Capillary Coater for Flexible Substrate

IP.com Disclosure Number: IPCOM000037872D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-30
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Canestaro, MJ: AUTHOR

Abstract

Disclosed is a simple device that can be used for continuous coating of flexible substrates. In particular, this device is well suited to place coating at a distance from the edge of the substrate. For example the coater can place liquid resist within a few mils of the sprocket holes without getting any of the resist in the holes, even though the substrate is not flat.

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Capillary Coater for Flexible Substrate

Disclosed is a simple device that can be used for continuous coating of flexible substrates. In particular, this device is well suited to place coating at a distance from the edge of the substrate. For example the coater can place liquid resist within a few mils of the sprocket holes without getting any of the resist in the holes, even though the substrate is not flat.

The capillary coater consists of two units: one, a substrate guide and two, a slider. The function of the substrate guide is to keep the substrate centered, and to keep the slider centered relative to the substrate. The slider has a reservoir and a feed line to supply the material to be coated. The area of contact of the slider with the substrate provides, by capillary action, a precisely defined strip of coating. The weight of the slider also keeps the substrate flat.

In operation the substrate is uniformly drawn through the substrate guide with the slider in place. The slider is kept from sliding off the substrate guide by the slider stop. The area contacting the substrate begins to rapidly wet out coatings 1/10 mil to 3/10 mil thick (thickness of the coating was regulated by percent solids of material to be coated).

(Image Omitted)

Disclosed anonymously.

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