Compliant micro device transfer head with integrated electrode leads
First Claim
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1. A micro device transfer head comprising:
- a base substrate;
a spring anchor coupled to the base substrate;
a spring arm coupled to the spring anchor, the spring arm including;
a mesa structure suspended over the base substrate;
a top electrode extending laterally from the spring anchor and over the mesa structure; and
a bottom electrode extending laterally from the spring anchor underneath the mesa structure and wrapping around and over the mesa structure, wherein the top electrode and the bottom electrode are electrically isolated from each other; and
a dielectric layer covering the top electrode and the bottom electrode over the mesa structure.
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Abstract
A compliant micro device transfer head and head array are disclosed. In an embodiment a micro device transfer head includes a spring arm having integrated electrode leads that is deflectable into a space between a base substrate and the spring arm.
162 Citations
21 Claims
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1. A micro device transfer head comprising:
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a base substrate; a spring anchor coupled to the base substrate; a spring arm coupled to the spring anchor, the spring arm including; a mesa structure suspended over the base substrate; a top electrode extending laterally from the spring anchor and over the mesa structure; and a bottom electrode extending laterally from the spring anchor underneath the mesa structure and wrapping around and over the mesa structure, wherein the top electrode and the bottom electrode are electrically isolated from each other; and a dielectric layer covering the top electrode and the bottom electrode over the mesa structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A micro device transfer head array comprising:
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a base substrate; and an array of transfer heads, each transfer head including; a spring anchor coupled to the base substrate; a spring arm coupled to the spring anchor, the spring arm including; a mesa structure suspended over the base substrate; a top electrode extending laterally from the spring anchor and over the mesa structure; and a bottom electrode extending laterally from the spring anchor underneath the mesa structure and wrapping around and over the mesa structure, wherein the top electrode and the bottom electrode are electrically isolated from each other; and a dielectric layer covering the top electrode and the bottom electrode over the mesa structure. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification