Industry Patents
Patent: 5217832
Permanent Color Transparencies on Single Substrates and Methods for Making the Same
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| Patent Number: |
5217832 |
| Title: |
Permanent Color Transparencies on Single Substrates and Methods for Making the Same |
| Abstract: |
Color transparencies having more than one imaged dichroic filter, and an
imaged neutral density filter, layered on one side of a single glass
substrate, and processes for making the same, are disclosed. In one
embodiment, the color transparency is produced by a deposition process
including the steps of coating a glass substrate with a photoresist and
developing an image thereupon, depositing alternating layers of high and
low refractive index dielectrics to form a dichroic layer of a primary
subtractive color, stripping the photoresist from the glass, preparing at
least one additional imaged dichroic filter on the first, and preparing a
neutral density filter on the substrate on the side having the layered
dichroic filters. A red antihalation coating may be applied to the lower
surface of the glass substrate prior to exposing the photoresist to
prevent undesirable exposure of additional portions of the photoresist
layer. In an alternative embodiment, an etching process is utilized
whereby stop-etch layers are deposited between each layer of the color
transparency. The stop-etch layers prevent image distortion and uneven
coloring during the etching process such that a high resolution color
transparency is produced.
|
| Country of Issue: |
US |
| First Named Inventor: |
Joslin, Nelson |
| Assignee: |
Walt Disney Company |
| Continuation or Divisional of: |
|
| International Classification: |
G03F 7/00 |
| US Classification: |
430/7 |
| Issue Date: |
06-08-1993 |
| Filing Date: |
01-23-1992 |
| Application : |
824670 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
5217832 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5217832 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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