Compliant micro device transfer head with integrated electrode leads
First Claim
Patent Images
1. A method, comprising:
- forming a dielectric layer over a substrate;
forming a first electrode layer over the dielectric layer;
forming a template on the first electrode layer, wherein the template has a mesa structure;
forming a second electrode layer over the template;
patterning the second electrode layer and first electrode layer to form a bottom electrode and a top electrode; and
removing a portion of the dielectric layer from underneath the bottom electrode to form a spring arm coupled to the substrate by a spring anchor, the spring arm including;
the mesa structure, wherein the mesa structure is suspended over the substrate;
the top electrode extending laterally from the spring anchor and over the mesa structure; and
the 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.
1 Assignment
0 Petitions
Accused Products
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.
120 Citations
10 Claims
-
1. A method, comprising:
-
forming a dielectric layer over a substrate; forming a first electrode layer over the dielectric layer; forming a template on the first electrode layer, wherein the template has a mesa structure; forming a second electrode layer over the template; patterning the second electrode layer and first electrode layer to form a bottom electrode and a top electrode; and removing a portion of the dielectric layer from underneath the bottom electrode to form a spring arm coupled to the substrate by a spring anchor, the spring arm including; the mesa structure, wherein the mesa structure is suspended over the substrate; the top electrode extending laterally from the spring anchor and over the mesa structure; and the 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification