发明授权
- 专利标题: Process condition evaluation method for liquid crystal display module
- 专利标题(中): 液晶显示模块的工艺条件评估方法
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申请号: US12314695申请日: 2008-12-15
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公开(公告)号: US07858405B2公开(公告)日: 2010-12-28
- 发明人: Jeong-Yeop Lee , Hoon Choi , Young Seok Choi , Kwang-Sik Oh
- 申请人: Jeong-Yeop Lee , Hoon Choi , Young Seok Choi , Kwang-Sik Oh
- 申请人地址: KR Seoul
- 专利权人: LG Display Co., Ltd.
- 当前专利权人: LG Display Co., Ltd.
- 当前专利权人地址: KR Seoul
- 代理机构: McKenna Long & Aldridge LLP
- 优先权: KR10-2008-0048248 20080523
- 主分类号: H01L21/66
- IPC分类号: H01L21/66 ; G01R31/26 ; G01R31/00
摘要:
A process condition evaluation method for a liquid crystal display module (LCM) includes: a first step of obtaining a threshold power measuring pattern, an analysis sample for a cell bonding status in an LCD fabrication process, and obtaining a lower substrate sample by separating an upper substrate from the threshold power measuring pattern; a second step of supplying voltages on a gate pad on the lower substrate sample with sequentially increasing a voltage level by a predetermined unit by using an electrical device, and obtaining a threshold current and a threshold voltage by measuring currents at a drain pad whenever voltage increased by a predetermined unit is applied to the gate pad; and a third step of obtaining threshold power based on the threshold current and the threshold voltage, and thereby evaluating process conditions of the LCM.
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