发明名称 |
Photodiode detector with integrated noise shielding |
摘要 |
A photodiode has integrated shields for the rejection of noise-producing electromagnetic interference and ambient light. The electromagnetic shield forms a conductive matrix which covers the photodiode active area. The matrix is deposited as a metallization layer onto the photodiode and provides exposed portions of the active area for light detection. A pad is electrically connected to the shield to allow external termination of the shield. The ambient-light shield is in the form of a colored encapsulant surrounding the photodiode. The encapsulant provides a high-pass light transmission characteristic which passes signal light and rejects out-of-band ambient light. The photodiode is particularly advantageous for use in pulse oximetry probes.
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申请公布号 |
US6184521(B1) |
申请公布日期 |
2001.02.06 |
申请号 |
US19980003224 |
申请日期 |
1998.01.06 |
申请人 |
MASIMO CORPORATION |
发明人 |
COFFIN, IV JAMES P.;GERHARDT THOMAS J.;MILLS MICHAEL A.;KIANI MASSI E. |
分类号 |
A61B5/00;(IPC1-7):H01J3/14 |
主分类号 |
A61B5/00 |
代理机构 |
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代理人 |
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地址 |
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