Invention Grant
- Patent Title: Overlay target for polarized light lithography
- Patent Title (中): 偏振光刻技术的叠加目标
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Application No.: US12470154Application Date: 2009-05-21
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Publication No.: US07807320B2Publication Date: 2010-10-05
- Inventor: Sajan Marokkey
- Applicant: Sajan Marokkey
- Applicant Address: DE Munich
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Munich
- Agency: Slater & Matsil, L.L.P.
- Main IPC: G03F9/00
- IPC: G03F9/00

Abstract:
A target and method for use in polarized light lithography. A preferred embodiment comprises a first structure located on a reference layer, wherein the first structure is visible through a second layer, and a second structure located on the second layer, wherein the second structure is formed from a photomask containing a plurality of sub-structures oriented in a first orientation, wherein a polarized light is used to pattern the second structure onto the second layer, and wherein a polarization of the polarized light is the same as the orientation of the plurality of sub-structures. The position, size, and shape of the second structure is dependent upon a polarity of the polarized light, permitting a single design for an overlay target to be used with different polarities of polarized light.
Public/Granted literature
- US20090233191A1 Overlay Target for Polarized Light Lithography Public/Granted day:2009-09-17
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