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レーザ液滴プラズマ照明器による光学結像システム
专利权人:
ケーエルエー−テンカー コーポレイション
发明人:
ソラーズ リチャード ダブリュ,デュラント ステファン ピー,ホワン ショウ−フェイ
申请号:
JP20130554464
公开号:
JP6019042(B2)
申请日:
2012.01.30
申请国别(地区):
日本
年份:
2016
代理人:
摘要:
A wafer inspection system includes a laser droplet plasma (LDP) light source that generates light with sufficient radiance to enable bright field inspection at wavelengths down to 40 nanometers. Light generated by the LDP source is directed to the wafer and light from the illuminated wafer is collected by a high NA objective with all reflective elements. A detector detects the collected light for further image processing. The LDP source includes a droplet generator that dispenses droplets of a feed material. An excitation light generated by a laser is focused on a droplet of the feed material. The interaction of the excitation light with the droplet generates a plasma that emits illumination light with a radiance of at least 10 W/mm2-sr within a spectral range from 40 nanometers to 200 nanometers.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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