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    • 6. 发明授权
    • Method for fabricating buried channel field-effect transistor for
microwave and millimeter frequencies
    • 用于制造微波和毫米频率的掩埋沟道场效应晶体管的方法
    • US4724220A
    • 1988-02-09
    • US817916
    • 1986-01-10
    • Joseph A. Calviello
    • Joseph A. Calviello
    • H01L21/768H01L23/48H01L29/08H01L29/812H01L21/265H01L21/302
    • H01L21/76898H01L23/481H01L29/0891H01L29/812H01L2924/0002Y10S148/053Y10S148/082Y10S148/088Y10S148/122
    • The fabrication of high performance and reliable Buried Channel Field Effect Transistor (BCFET) using Schottky gate junction and heavily doped N layers for the source and drain electrode is described. The BCFET is composed of a semi-insulating substrate in which two N layers for the drain electrodes and one N layer for the source electrode are formed in one of the semi-insulating surface. The N source electrode is centrally located between the two N electrodes and all three lie in the same plane. The source and drain electrodes are separated by a thin semi-insulating layer, the length of which can range from 0.5 micron to several micron range, depending on the desired voltage breakdown. A Schottky gate is defined in an active N layer directly above the source N layer. The ohmic contacts for the source and drain N layers are defined several microns away from the Schottky junction, resulting in a considerable improvement in device reliability. Reliability is further enhanced by the fact that the resulting device is buried within the material where it is insulated from the ambient.
    • 描述了使用肖特基栅极结和用于源极和漏极的重掺杂N层的高性能和可靠的埋地沟道场效应晶体管(BCFET)的制造。 BCFET由半绝缘基板构成,其中在半绝缘表面之一上形成有用于漏电极的两个N层和用于源电极的一个N层。 N源电极位于两个N电极之间的中心,所有三个位于同一平面。 根据所需的电压击穿,源极和漏极由薄的半绝缘层分隔开,半绝缘层的长度可以在0.5微米到几微米的范围内。 在源N层正上方的有源N层中定义肖特基门。 用于源极和漏极N层的欧姆接触距离肖特基结约几微米,导致器件可靠性的显着提高。 通过将所得到的装置埋在材料中与绝缘材料绝缘的事实进一步增强了可靠性。
    • 10. 发明授权
    • Method for fabrication of monolithic integrated circuits
    • 单片集成电路制造方法
    • US4789645A
    • 1988-12-06
    • US40418
    • 1987-04-20
    • Joseph A. CalvielloPaul R. BieRonald J. Pomian
    • Joseph A. CalvielloPaul R. BieRonald J. Pomian
    • H01L21/70H01L21/8252H01L29/48H01L21/283
    • H01L21/707H01L21/8252Y10S148/014Y10S148/021Y10S438/913
    • During fabrication of monolithic microwave integrated circuits, active devices having sources, gates, drains, and/or Schottky barrier junctions are first provided for an epitaxial layers. Then many layers of metals and oxides are produced thereover in situ without removing the circuit from its environmental chamber. Circuit elements are then defined by processing of the many layers sequentially by photolithography and other processes from the top of the chip downward. Certain combinations of metals, oxides, and processes are selected to enable fabrication of circuits from the top down in this way. This reduces inclusion of contaminating chemical films and particles between the desired layers. Lumped and distributed capacitors, resistors, inductors, transmission lines, contacts, and complete active devices are monolithically defined, with a reduced number of process steps. An all-refractory MESFET is described, having a Schottky barrier gate and nonalloyed ohmic contacts for source and drain producible at room temperatures. Source, gate, and drain can be defined with a single mask. A thinner gold layer is formed for FET contacts than for other circuit conductors and elements by means of a configured tantalum layer buried in a thick gold layer.
    • 在制造单片微波集成电路期间,首先提供具有源极,栅极,漏极和/或肖特基势垒结的有源器件用于外延层。 然后在原地生产许多层金属和氧化物,而不从其环境室中移除电路。 然后通过光刻和从芯片的顶部向下的其它处理顺序地处理许多层来定义电路元件。 选择金属,氧化物和工艺的某些组合以使得能够以这种方式从上到下制造电路。 这减少了污染化学膜和颗粒在所需层之间的包含。 集中和分布式电容器,电阻器,电感器,传输线,触点和完整的有源器件都是单片定义的,数量减少的工艺步骤。 描述了全难熔MESFET,其具有肖特基势垒栅极和用于在室温下可产生的源极和漏极的非合金欧姆接触。 源,栅极和漏极可以用单个掩模定义。 通过埋在厚金层中的配置的钽层,为FET触点形成更薄的金层,而不是其他电路导体和元件。