Patent ID: 11942352
Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A stretchable stamp for transferring an LED chip, comprising:
a body; and
a plurality of pick-up pillars arranged in a predetermined pattern on one surface of the body to transfer the LED chip,
wherein the body comprises an elastomer that can be stretched in more than one (uniaxial) direction,
wherein the plurality pick-up pillars comprises a cylinder portion connected to the body and a top portion having a larger cross-sectional area than the cylinder portion on the upper surface of the cylinder portion and contacting an LED chip when the LED chip is transferred,
wherein the cross-sectional area ratio of the cylinder portion and the top portion is 100:130 to 100:300, and
wherein the cylinder portion and the top portion each have a columnar shape.