TRANSFER METHOD OF EXPANDING PITCHES OF DEVICE AND AN APPARATUS FOR PERFORMING THE SAME
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United States of America Patent
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Issued Date -
Feb 7, 2019
app pub date -
Aug 6, 2018
filing date -
Aug 7, 2017
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Abstract
A transfer method for expanding pitches of devices includes: providing a first substrate with micro devices having the pitches being a predetermined value in a first direction and a second direction; transferring the micro devices to a first roller by contacting it with the micro devices, wherein a pitch of contact line portions on the first roller is N times of the predetermined value; transferring the micro devices on the first roller to a second substrate; rotating the second substrate by 90 degrees; transferring the micro devices to a second roller by rolling the second roller to contact the micro devices; and then transferring the micro devices to a third substrate to expand the pitch of the micro devices in both the first and the second directions. The portions in contact with the micro devices all have adhesive layers with different adhesion operation windows.
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