Micro device transfer head array with metal electrodes
First Claim
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1. A micro device transfer head array, comprising:
- a base substrate;
a first insulating layer on the base substrate;
an array of electrostatic transfer heads, each electrostatic transfer head including a mesa structure over the first insulating layer, wherein each mesa structure has a maximum width of 1 to 100 μ
m;
a second insulating layer over a top surface of each of the mesa structures;
a patterned metal layer over the second insulating layer and the top surface of each of the mesa structures;
a through via extending through the base substrate; and
a dielectric layer covering the patterned metal layer on the top surface of each of the mesa structures.
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Abstract
A monopolar and bipolar micro device transfer head array and method of forming a monopolar and bipolar micro device transfer array are described. In an embodiment, a micro device transfer head array includes a base substrate, a first insulating layer formed over the base substrate, and an array of mesa structures. A second insulating layer may be formed over the mesa structure, a patterned metal layer over the second insulating layer, and a dielectric layer covering the metal layer.
138 Citations
21 Claims
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1. A micro device transfer head array, comprising:
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a base substrate; a first insulating layer on the base substrate; an array of electrostatic transfer heads, each electrostatic transfer head including a mesa structure over the first insulating layer, wherein each mesa structure has a maximum width of 1 to 100 μ
m;a second insulating layer over a top surface of each of the mesa structures; a patterned metal layer over the second insulating layer and the top surface of each of the mesa structures; a through via extending through the base substrate; and a dielectric layer covering the patterned metal layer on the top surface of each of the mesa structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A micro device transfer head array, comprising:
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a base substrate; a first insulating layer over the base substrate; an array of electrostatic transfer heads, each electrostatic transfer head including a mesa structure over the first insulating layer, wherein each mesa structure has a maximum width of 1 to 100 μ
m;a second insulating layer over the array of mesa structures; a patterned metal layer over the second insulating layer and a top surface of each of the mesa structures; and a dielectric layer covering the patterned metal layer on the top surface of each of the mesa structures. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification