Micro pick up array pivot mount design for strain amplification
First Claim
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1. A pivot mount comprising:
- a pivot platform;
a base;
a primary spring arm fixed to the pivot platform at a primary inner root, fixed to the base at a primary outer root, and characterized by a corresponding primary axis length spanning between the primary outer root and primary inner root; and
a secondary spring arm fixed to the pivot platform at a secondary inner root, fixed to the base at a secondary outer root, and characterized by a secondary axis length spanning between the secondary outer root and secondary inner root; and
a strain sensing element along the secondary spring arm;
wherein the secondary spring arm is characterized as having a lower stiffness than the primary spring arm.
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Abstract
Systems and methods for aligning a transfer head assembly with a substrate are disclosed. In an embodiment a pivot mount is used for generating a feedback signal in a closed-loop motion control system. In an embodiment, the pivot mount includes primary spring arms and secondary spring arms extending between a pivot platform and a base of the pivot mount. The secondary spring arms are characterized by a lower stiffness than the primary spring arms, and strain sensing elements are located along the secondary spring arms.
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Citations
21 Claims
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1. A pivot mount comprising:
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a pivot platform; a base; a primary spring arm fixed to the pivot platform at a primary inner root, fixed to the base at a primary outer root, and characterized by a corresponding primary axis length spanning between the primary outer root and primary inner root; and a secondary spring arm fixed to the pivot platform at a secondary inner root, fixed to the base at a secondary outer root, and characterized by a secondary axis length spanning between the secondary outer root and secondary inner root; and a strain sensing element along the secondary spring arm; wherein the secondary spring arm is characterized as having a lower stiffness than the primary spring arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A transfer tool comprising:
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an articulating transfer head assembly; a pivot mount, mountable onto the articulating transfer head assembly comprising; a pivot platform; a base; a primary spring arm fixed to the pivot platform at a primary inner root, fixed to the base at a primary outer root, and characterized by a corresponding primary axis length spanning between the primary outer root and primary inner root; and a secondary spring arm fixed to the pivot platform at a secondary inner root, fixed to the base at a secondary outer root, and characterized by a secondary axis length spanning between the secondary outer root and secondary inner root; and a strain sensing element along the secondary spring arm; wherein the secondary spring arm is characterized as having a lower stiffness than the primary spring arm; and a micro pick up array mountable onto the pivot platform of the pivot mount, the micro pick up array including an array of transfer heads. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification