Optical-interference type reflective panel and method for making the same

• US 20040145811A1
• Filed: 01/08/2004
• Published: 07/29/2004
• Est. Priority Date: 01/29/2003
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Prime View International Company Limited (E Ink Holdings Incorporated)
• Inventors: Lin, Wen-Jian, Tsai, Hsiung-Kuang
• Granted Patent: US 6,999,236 B2
• Time in Patent Office: Days
• US Class Current: 359/585
• CPC Class Codes: G02B 26/001 based on interference in an adjustable optical cavity interference filters G02B5/28; devices or arrangements using multiple reflections in spectrometry or monochromators G01J3/26
• CPC Class Codes: G02B 5/288 comprising at least one thin film resonant cavity, e.g. in bandpass filters

Abstract

An optical-interference type reflective panel and a method for making the same are disclosed, wherein the display panel has a substrate on which multiple supporting layers are firstly formed. Then, a plurality of first conductive optical film stacks, spacing layers and multiple second conductive optical film stacks are sequentially formed on the substrate. Finally, once the spacing layers are removed, optical-interference regulators are formed. Since said supporting layers forming step is prior to the first conductive optical film stacks, a precise back-side exposing step is not necessary so that the making procedure of the panel is simplified.

Claims

1. A method for making an optical interference type reflective panel, the method comprising the steps of:

providing a substrate (10);

sequentially forming a plurality of supporting layers (11), a plurality offirst conductive optical film stacks (12), a spacing layer (13) and a plurality of second conductive optical film stacks (13) on the substrate (10); and

removing the spacing layer (13) from the substrate (10) to form optical-interference regulators on the substrate.

2. The method as claimed in claim 1, the method further comprising the steps of:

forming the plurality of supporting layers (11) on the substrate (10);

forming the first conductive optical film stacks (12) on the substrate (10) and between adjacent supporting layers (11);

forming the spacing layer (13) on the substrate (10), wherein the spacing layer (13) is flattened;

forming the second conductive optical film stacks (14) above the adjacent supporting layers (11); and

removing the spacing layer (13), wherein once the spacing layer (13) has been removed from the substrate (10), a gap is defined between the first and the second conductive optical film stacks (12)(14) and the second conductive optical film stack is sustained by the adjacent supporting layers (11).

3. The method as claimed in claim 1, wherein the first conductive optical film stack (12) covers a part of the adjacent supporting layers (11), and the second conductive optical film stack (14) is formed above regions where the first conductive optical film stack (12) overlaps the adjacent supporting layers (11).

4. The method as claimed in claim 2, wherein the first conductive optical film stack (12) covers a part of the adjacent supporting layers (11), and the second conductive optical film stack (14) is formed above regions where the first conductive optical film stack (12) overlaps the adjacent supporting layers (11).

5. The method as claimed in claim 1, wherein the substrate (10) is composed of glass or macromolecule material.

6. The method as claimed in claim 2, wherein the substrate (10) is composed of glass or macromolecule material.

7. The method as claimed in claim 1, wherein the first conductive optical film stack (12) is composed of a transparent conductive layer (121), an absorption layer (122) and at least one dielectric layer (124).

8. The method as claimed in claim 2, wherein the first conductive optical film stack (12) is composed of a transparent conductive layer (121), an absorption layer (122) and at least one dielectric layer (124).

9. The method as claimed in claim 1, wherein the second conductive optical film stack (14) contains at least one optical reflective layer therein.

10. The method as claimed in claim 2, wherein the second conductive optical film stack (14) contains at least one optical reflective layer therein.

11. An optical interference reflective panel comprising:

a substrate (10);

a plurality of supporting layers (11) formed on the substrate (10);

a plurality of first conductive optical film stacks (12) formed on the substrate (10), wherein each first conductive optical film stack (12) is formed between adjacent supporting layers (11) and covers a part of the adjacent supporting layers (11); and

a plurality of second conductive optical film stacks (14) formed above the first conductive optical film stacks (12), wherein the second conductive optical film stacks (14) partly overlap regions where the first conductive optical film stacks (12) are formed above the adjacent supporting layers (11).

12. The reflective panel as claimed in claim 11, wherein the substrate (10) is composed of glass or macromolecule material.

13. The reflective panel as claimed in claim 11, wherein the first conductive optical film stack (12) is composed of a transparent conductive layer (121), an absorption layer (122) and at least one dielectric layer (124).

14. The reflective panel as claimed in claim 11, wherein the second conductive optical film stack (14) contains at least one optical reflective layer therein.