Micro pick and bond assembly
First Claim
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1. A micro-pick-and-bond (μ
- PnB) assembly head, comprising;
a substrate; and
a plurality of pedestals over a surface of the substrate, wherein each pedestal comprises;
a base comprising a dielectric material, wherein the base is mechanically coupled to the substrate; and
a pressure sensitive adhesive (PSA) material exposed at a free end of the pedestal opposite the substrate, wherein the PSA is separated from the substrate by the base, and the PSA has a lateral dimension of micrometer scale and;
a plurality of flexural members over the substrate, each pedestal coupled to the substrate through one or more of the flexural members.
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Abstract
Micro pick-and-bond heads, assembly methods, and device assemblies. In, embodiments, micro pick-and-bond heads transfer micro device elements, such as (micro) LEDs, en masse from a source substrate to a target substrate, such as a LED display substrate. Anchor and release structures on the source substrate enable device elements to be separated from a source substrate, while pressure sensitive adhesive (PSA) enables device elements to be temporarily affixed to pedestals of a micro pick-and-bond head. Once the device elements are permanently affixed to a target substrate, the PSA interface may be defeated through peeling and/or thermal decomposition of an interface layer.
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Citations
19 Claims
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1. A micro-pick-and-bond (μ
- PnB) assembly head, comprising;
a substrate; and a plurality of pedestals over a surface of the substrate, wherein each pedestal comprises; a base comprising a dielectric material, wherein the base is mechanically coupled to the substrate; and a pressure sensitive adhesive (PSA) material exposed at a free end of the pedestal opposite the substrate, wherein the PSA is separated from the substrate by the base, and the PSA has a lateral dimension of micrometer scale and; a plurality of flexural members over the substrate, each pedestal coupled to the substrate through one or more of the flexural members. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- PnB) assembly head, comprising;
Specification