发明名称 |
CHARGE SENSORS USING INVERTED LATERAL BIPOLAR JUNCTION TRANSISTORS |
摘要 |
A method for forming a sensor includes forming a base-region barrier in contact with a base substrate. The base-region barrier includes a monocrystalline semiconductor having a same dopant conductivity as the base substrate. An emitter and a collector are formed in contact with and on opposite sides of the base-region barrier to form a bipolar junction transistor. The collector, the emitter and the base-region barrier are planarized to form a level surface opposite the base substrate such that when the level surface is exposed to charge, the charge is measured during operation of the bipolar junction transistor. |
申请公布号 |
US2015253438(A1) |
申请公布日期 |
2015.09.10 |
申请号 |
US201514657864 |
申请日期 |
2015.03.13 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
Cai Jin;Ning Tak H.;Yau Jeng-Bang;Zafar Sufi |
分类号 |
G01T1/24;G01T3/08 |
主分类号 |
G01T1/24 |
代理机构 |
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代理人 |
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主权项 |
1. A sensing method, comprising:
providing a sensor having a collector, an emitter and a base-region barrier formed as an inverted bipolar junction transistor having a base substrate forming a base electrode to activate the inverted bipolar junction transistor, and a level surface formed by the collector, the emitter and the base-region barrier opposite the base substrate such that when the level surface is exposed to charge, the charge is measured during operation of the bipolar junction transistor; accumulating charge at or near the level surface; and activating the base substrate as a base electrode to enable the bipolar junction transistor to measure a dose or number of interactions which is proportional to the accumulated charge. |
地址 |
Armonk NY US |