Methods for manufacturing micropolarizers
First Claim
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1. A method for fabricating a micropolarizer, comprising the steps of:
- providing a first polarized film having a first polarization state, P1 and coated with photoresist;
exposing the film to a source of electromagnetic radiation through a mask having a first predetermined pattern;
removing parts of the first film exposed to the electromagnetic radiation through the mask;
repeating the providing, exposing and removing steps with a second polarized film having a second polarization state, P2 and coated with photoresist and using a mask having a second predetermined pattern that is an inverse of the first predetermined pattern;
aligning the first polarized film and the second polarized film so that the removed parts of the first film are aligned with those parts of the second film that were not removed;
laminating the aligned first and second films to one another.
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Abstract
A method of mass producing a micropolarizer including the steps exposing films of predetermined polarization states to electromagnetic radiation through masks of predetermined patterns, etching away exposed parts of each film and aligning and laminating the films to one another to provide a microplolarizer comprising alternating sets of microscopic polarizers with different polarization states.
151 Citations
56 Claims
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1. A method for fabricating a micropolarizer, comprising the steps of:
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providing a first polarized film having a first polarization state, P1 and coated with photoresist; exposing the film to a source of electromagnetic radiation through a mask having a first predetermined pattern; removing parts of the first film exposed to the electromagnetic radiation through the mask; repeating the providing, exposing and removing steps with a second polarized film having a second polarization state, P2 and coated with photoresist and using a mask having a second predetermined pattern that is an inverse of the first predetermined pattern; aligning the first polarized film and the second polarized film so that the removed parts of the first film are aligned with those parts of the second film that were not removed; laminating the aligned first and second films to one another.
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2. A method of fabricating a micropolarizer, comprising the steps of:
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providing a first film having a first pattern of optically active and non-optically active parts; providing a second film having a second pattern of optically active and non-optically active parts;
wherein the optically active parts of the second film affect light differently than the optically active parts of the first film and the first pattern is an inverse of the second pattern;thereafter, aligning the first and second films so that the optically active parts of the first film are aligned with and overlap the non-optically active parts of the second film and vice versa; and laminating the aligned first and second films to one another. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. A method for fabricating a micropolarizer, comprising the steps of:
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providing a first film coated with a protective mask having a predetermined pattern that exposes preselected parts of the first film; thereafter, treating the first film to affect the preselected parts of the first film to provide a pattern of polarized and unpolarized parts of the first film, the polarized parts of the first film having a first polarization state, P1; repeating the providing and treating steps with a second film coated with a protective mask to provide a pattern of polarized and unpolarized parts of the second film, the polarized parts of the second film having a second polarization state, P2, and, using a mask having a second predetermined pattern that is an inverse of the first predetermined pattern; thereafter, aligning the treated first and second films so that the polarized parts of the first film are aligned with and overlap the unpolarized parts of the second film and vice versa; and laminating the aligned first and second films to one another. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for fabricating a patterned polarizer film, comprising the steps of:
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providing a first film coated with a protective mask having a predetermined pattern that exposes preselected parts of the first film; and thereafter, treating the first film to affect the preselected parts of the first film to provide a pattern of polarized and unpolarized parts of the first film, the polarized parts of the first film having a first polarization state, P1. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A method of fabricating a micropolarizer, comprising the steps of:
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providing a first film having a first pattern of polarized and unpolarized parts, the polarized parts of the first film having a first polarization state, P1; providing a second film having a second pattern of polarized and unpolarized parts, the polarized parts of the second film having a second polarization state, P2, and wherein the first pattern is an inverse of the second pattern; thereafter, aligning the first and second films so that the polarized parts of the first film are aligned with and overlap the unpolarized parts of the second film and vice versa; and laminating the aligned first and second films to one another. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification