Packaging for an interferometric modulator
View Patent ↗A package is made of a transparent substrate having an interferometric modulator and a back plate. A non-hermetic seal joins the back plate to the substrate to form a package, and a desiccant resides inside the package. A method of packaging an interferometric modulator includes providing a transparent substrate and manufacturing an interferometric modulator array on a backside of the substrate. A back plate is provided and a desiccant is applied to the back plate. The back plate is sealed to the backside of the substrate with a back seal in ambient conditions, thereby forming a package.
1. A display apparatus package, comprising:
a transparent substrate;
a plurality of interferometric modulator arrays formed on a back side of the substrate;
a back plate;
a seal circumscribing each of said arrays and joining the back plate to the back side of the substrate to form a multiple sub-packages wherein each sub-package comprises one of said arrays; and
a desiccant inside the multiple sub-packages,
wherein the transparent substrate comprises scribed lines between the multiple sub-packages.
2. The package of claim 1 , wherein the transparent substrate is made from: glass, plastic, metal, silicon, ceramic or transparent polymers.
3. The package of claim 1 , wherein the seal further comprises a non-hermetic seal.
4. The package of claim 1 , wherein the seal is a hermetic seal.
5. The package of claim 1 , wherein the interferometric modulator further comprises a membrane modulator, or a separable modulator.
6. The package of claim 1 , wherein the back plate is made of glass, metal, foil, polymer, plastic, ceramic and or semiconductor materials.
7. The package of claim 1 , wherein the seal comprises an epoxy-based adhesive, o-ring, PIB, poly-urethane, thin film metal weld, liquid spin-on glass, solder, polymer, or plastic seal.
8. The package of claim 1 , wherein the package comprises a desiccant and the desiccant is a zeolite, molecular sieve, surface adsorbent, bulk adsorbent, or chemical reactant desiccant.
9. The package of claim 8 , wherein the molecular sieve is formed by a process selected from the group consisting of: molecular sieves in deposited thin films, molecular sieves in spun on polymers, sprayed on molecular sieves, and regenerated molecular sieves prepared in advance.
10. The package of claim 1 , wherein the amount of the desiccant is selected to affect an operation of the interferometric modulator.
11. The package of claim 1 , wherein the desiccant comprises a desiccant embedded into the interferometric modulator.
12. The package of claim 1 , wherein the desiccant comprises a desiccant embedded into a component of the package.
13. The package of claim 1 , wherein the desiccant is selected to affect the actuation voltage of the interferometric modulator.
14. The package of claim 1 , wherein the desiccant is selected to affect the release voltage of the interferometric modulator.
15. The package of claim 1 , wherein the desiccant is selected to affect the partial pressure of gases inside the package.
16. The package of claim 1 , wherein the desiccant is selected to affect the response time of the interferometric modulator.
17. The package of claim 1 , wherein the desiccant is selected to affect the lifetime of the interferometric modulator.
18. The package of claim 1 , wherein the desiccant is selected to affect the rate of corrosion of the interferometric modulator.
19. The package of claim 1 , wherein the interferometric modulator comprises a movable surface and a fixed surface.
20. The package of claim 1 , wherein the back plate comprises at least one recessed region.
21. The package of claim 20 , wherein the interferometric modulator is fit into the recessed region.
22. The package of claim 20 , wherein the desiccant is located in the recessed region.
23. The package of claim 1 , further comprising ribs on the back plate.
24. The package of claim 1 , wherein the back plate comprises two or more layers.
25. The package of claim 1 , wherein the back plate comprises a frame on top of a plate.
26. The package of claim 1 , wherein the back plate comprises ribs on top of a plate.
27. The package of claim 1 , wherein the back plate comprises a patterned layer of seal material on top of a plate.