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    • 1. 发明专利
    • Phase shift mask and method for manufacturing light condensing element
    • 相变膜掩模和制造光聚光元件的方法
    • JP2008083189A
    • 2008-04-10
    • JP2006260770
    • 2006-09-26
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • ISHII MOTONORIONOZAWA KAZUTOSHITOSHIKIYO KIMIAKIMATSUNO TOSHINOBUYOKO TAKANORI
    • G03F1/29G03F1/68
    • G03F7/0005G03F1/30
    • PROBLEM TO BE SOLVED: To provide a phase shift mask for improving the accuracy of a fine structure in a semiconductor device having a concentric pattern. SOLUTION: The phase shift mask for manufacturing a semiconductor element comprises concentrically disposed light shielding portions 101b, 101a2, 101a1, a light transmitting portion 102, a phase shift portion 103 and an auxiliary pattern portion 104, wherein the width of the auxiliary pattern portion 104 in a radial direction is smaller than both of the width of the light transmitting portion 102 in the radial direction and the width of the phase shift portion 103 in the radial direction. The phase of exposure light passing through the auxiliary pattern portion 104 may be an inverted phase to the phase of exposure light passing through the light transmitting portion 102 or the phase shift portion 103 close to the auxiliary pattern portion 104. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种用于提高具有同心图案的半导体器件中的精细结构精度的相移掩模。 解决方案:用于制造半导体元件的相移掩模包括同心设置的遮光部分101b,101a2,101a1,光透射部分102,相移部分103和辅助图案部分104,其中辅助 径向方向上的图案部分104小于透光部分102在径向上的宽度和相移部分103在径向方向上的宽度。 通过辅助图案部分104的曝光光的相位可以是与通过透光部分102或相移部分103接近辅助图案部分104的曝光光的相位相反的相位。版权所有( C)2008,JPO&INPIT
    • 6. 发明专利
    • HETEROJUNCTION TYPE FIELD EFFECT TRANSISTOR
    • JPH01145871A
    • 1989-06-07
    • JP30506887
    • 1987-12-01
    • MATSUSHITA ELECTRIC IND CO LTD
    • INOUE KAORUMATSUNO TOSHINOBU
    • H01L29/201H01L21/338H01L29/778H01L29/80H01L29/812
    • PURPOSE:To improve reproducibility in manufacturing a hetero structure and to improve the yield rate in manufacturing, by replacing an N-type GaAs layer and a non-doped GaAs layer with non-doped AlGaAs, an N-type AlGaAs layer and a non-doped AlGaAs layer in a heterojunction FET. CONSTITUTION:On a GaAs buffer layer, a non-doped AlGaAs layer 3 having a thickness of 100Angstrom or less, an N-type AlGaAs layer 4 having a thickness of 50-100Angstrom and a non-doped AlGaAs layer 5 having a thickness of 20Angstrom are sequentially grown, and a first electron feeding layer is formed. An InxGa1-xAs layer 6 having a thickness of 100-200Angstrom , in which the composition ratio of InAs is 0.25 or less, is formed thereon. A non-doped AlGaAs spacer layer 7 having a thickness of 2Angstrom and an N-type AlGaAs layer 8 are formed on the InxGa1-xAs layer 6, and a second electron feeding layer is formed. In this structure, the composition ratio of AlAs in the entire AlGaAs layers is made to be 0.2 or less in order to decrease the concentration of a deep defect called a DX center, which is included in the N-type AlGaAs and to stabilize the characteristics of the FET at low temperature. The typical value of the ratio 0.15 is used.