MEMS devices on flexible substrate
First Claim
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1. A flexible film, comprising:
- one or more MEMS elements;
a first metallic layer having a first outer major surface and a first inner major surface;
a first polymer layer adjacent the first metallic layer, the first inner major surface facing the first polymer layer;
a second metallic layer having a second outer major surface and a second inner major surface, the second inner major surface facing the first polymer layer, the first polymer layer disposed between the first and second metallic layers,wherein each MEMS element in the one or more MEMS elements includes;
a first metallic region in the first metallic layer, the first metallic region including a first perforation;
a first voided region in the first polymer layer, the first voided region extending continuously through a thickness of the first polymer layer; and
a second metallic region in the second metallic layer, the second metallic region including a portion that is capable of a movement relative to the first metallic region,wherein the flexible film is sufficiently flexible that the flexible film can be wound into a roll of the flexible film.
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Abstract
A flexible film including one or more MEMS elements and articles including the flexible film are described. The flexible film includes a polymer layer between two metal layers with one of the metal layers containing a perforation. The polymer layer includes voided regions that allow for relative movement of the two metal layers.
32 Citations
16 Claims
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1. A flexible film, comprising:
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one or more MEMS elements; a first metallic layer having a first outer major surface and a first inner major surface; a first polymer layer adjacent the first metallic layer, the first inner major surface facing the first polymer layer; a second metallic layer having a second outer major surface and a second inner major surface, the second inner major surface facing the first polymer layer, the first polymer layer disposed between the first and second metallic layers, wherein each MEMS element in the one or more MEMS elements includes; a first metallic region in the first metallic layer, the first metallic region including a first perforation; a first voided region in the first polymer layer, the first voided region extending continuously through a thickness of the first polymer layer; and a second metallic region in the second metallic layer, the second metallic region including a portion that is capable of a movement relative to the first metallic region, wherein the flexible film is sufficiently flexible that the flexible film can be wound into a roll of the flexible film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16)
wherein each MEMS element further includes; a second voided region in the second polymer layer, and a third metallic region in the third metallic layer, the third metallic region including a second perforation.
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8. The flexible film of claim 7, wherein the second voided region is aligned with the second perforation such that a second continuous open region extends between the third outer major surface of the third metallic layer to the second outer major surface of the second metallic layer.
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9. The flexible film of claim 1, wherein the movement is in a direction substantially normal to the second outer major surface.
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10. The flexible film of claim 1, wherein the movement is substantially in a plane containing the second outer major surface.
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11. The flexible film of claim 1, wherein the one or more MEMS elements is a plurality of MEMS elements.
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12. The flexible film of claim 1, wherein the first outer major surface is either a first free standing surface or is immediately adjacent a first outer polymeric layer or a first adhesive layer and the second outer major surface is either a second free standing surface or is immediately adjacent a second outer polymeric layer or a second adhesive layer.
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13. A roll of the flexible film of claim 1.
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15. The flexible film of claim 1, wherein the first polymer layer includes a polymer selected from the group consisting of polyimide, polycarbonate, polyethylene terephthalate, benzocyclobutene polymer, liquid crystal polymer and polydimethylsiloxane.
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16. The flexible film of claim 1, wherein at least one of the first metallic layer and the second metallic layer includes a metal selected from the group consisting of copper, nickel, chromium, titanium, aluminum, gold, silver, beryllium and alloys thereof.
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14. An article comprising a non-planar surface and a flexible film conformably attached to the non-planar surface, wherein the flexible film comprises:
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one or more MEMS elements; a first metallic layer having a first outer major surface and a first inner major surface; a first polymer layer adjacent the first metallic layer, the first inner major surface facing the first polymer layer; a second metallic layer having a second outer major surface and a second inner major surface, the second inner major surface facing the first polymer layer, the first polymer layer disposed between the first and second metallic layers, wherein each MEMS element in the one or more MEMS elements includes; a first metallic region in the first metallic layer, the first metallic region including a first perforation; a first voided region in the first polymer layer, the first voided region extending continuously through a thickness of the first polymer layer; and a second metallic region in the second metallic layer, the second metallic region including a portion that is capable of a movement relative to the first metallic region.
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Specification