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    • 4. 发明申请
    • SEMICONDUCTOR DEVICE STRUCTURES COMPRISING POLYCRYSTALLINE CVD DIAMOND WITH IMPROVED NEAR-SUBSTRATE THERMAL CONDUCTIVITY
    • 包含具有改进的近基板热导率的多晶CVD金刚石的半导体器件结构
    • WO2015031833A2
    • 2015-03-05
    • PCT/US2014053544
    • 2014-08-29
    • ELEMENT SIX TECHNOLOGIES US CORPNASSER-FAILI FIROOZ
    • NASSER-FAILI FIROOZ
    • H01L21/02
    • H01L21/0228C23C16/0245C23C16/0254C23C16/0272C23C16/27H01L21/02115H01L21/02389H01L21/02444H01L21/02488H01L21/02513H01L21/02527H01L21/0262H01L21/02658H01L21/31111H01L23/3732H01L29/2003H01L2924/0002H01L2924/00
    • A semiconductor device structure comprising: a layer of III-V compound semiconductor material; a layer of polycrystalline CVD diamond material; and an interface region between the layer of III-V compound semiconductor material and the layer of polycrystalline CVD diamond material, the interface region including a diamond nucleation layer of polycrystalline CVD diamond which is formed during an initial nucleation phase of polycrystalline CVD diamond growth over a substrate comprising the layer of III-V compound semiconductor material, wherein the diamond nucleation layer is such that a Raman signal generated by a laser focused on a region comprising the diamond nucleation layer exhibits an sp3 carbon peak at 1332 cm-1 having a full width half-maximum of no more than 5.0 cm-1, wherein the diamond nucleation layer is such that said Raman signal further exhibits one or both of the following characteristics: (i) an sp2 carbon peak at 1550 cm-1 having a height which is no more than 20% of a height of the sp3 carbon peak at 1332 cm-1 after background subtraction when using a Raman excitation source at 633 nm; and (ii) the sp3 carbon peak at 1332 cm-1 is no less than 10% of local background intensity in a Raman spectrum using a Raman excitation source at 785 nm, and wherein an average nucleation density at a nucleation surface of the diamond nucleation layer is no less than 1 x 108 cm-2and no more than 1 x 1012 cm-2.
    • 一种半导体器件结构,包括:III-V族化合物半导体材料层; 一层多晶CVD金刚石材料; 以及在III-V族化合物半导体材料层和多晶CVD金刚石材料层之间的界面区域,界面区域包括多晶CVD金刚石的金刚石成核层,其在多晶CVD金刚石生长的初始成核阶段期间形成, 其中所述金刚石成核层使得由聚焦在包含所述金刚石成核层的区域上的激光产生的拉曼信号在1332cm -1处展现sp3碳峰,所述sp3碳峰具有全宽度 半最大值不超过5.0cm -1,其中所述金刚石成核层使得所述拉曼信号进一步表现出以下特征中的一个或两个:(i)1550cm -1处的sp 2碳峰,其高度为 当在633nm处使用拉曼激发源时背景扣除后1332cm-1处sp3碳峰的高度不超过20%; 和(ii)1332cm -1处的sp 3碳峰在拉曼光谱中使用拉曼激发源在785nm处不小于局部背景强度的10%,并且其中在金刚石成核的成核表面处的平均成核密度 层不小于1×10 8 cm -2并且不大于1×10 12 cm -2。