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    • 2. 发明申请
    • LATERALLY CONTACTED BLUE LED WITH SUPERLATTICE CURRENT SPREADING LAYER
    • 具有超级电流扩展层的横向接触蓝光LED
    • WO2013009394A1
    • 2013-01-17
    • PCT/US2012/039208
    • 2012-05-23
    • BRIDGELUX, INC.CHEN, ZhenFENWICK, WilliamLESTER, Steve
    • CHEN, ZhenFENWICK, WilliamLESTER, Steve
    • H01L33/04H01L33/32H01L33/14
    • H01L33/04H01L33/14H01L33/32
    • A laterally contacted blue LED device involves a PAN structure disposed over an insulating substrate. The substrate may be a sapphire substrate that has a template layer of GaN grown on it. The PAN structure includes an re¬ type GaN layer, a light-emitting active layer involving indium, and a p-type GaN layer. The n-type GaN layer has a thickness of at least 500nm. A Low Resistance Layer (LRL) is disposed between the substrate and the PAN structure such that the LRL is in contact with the bottom of the n- layer. In one example, the LRL is an AlGaN/GaN superlattice structure whose sheet resistance is lower than the sheet resistance of the n-type GnA layer. The LRL reduces current crowding by conducting current laterally under the n-type GaN layer. The LRL reduces defect density by preventing dislocation threads in the underlying GaN template from extending up into the PAN structure.
    • 横向接触的蓝色LED装置涉及设置在绝缘基板上的PAN结构。 衬底可以是具有在其上生长的GaN的模板层的蓝宝石衬底。 PAN结构包括RE型GaN层,包含铟的发光活性层和p型GaN层。 n型GaN层的厚度为500nm以上。 在基板和PAN结构之间设置低电阻层(LRL),使得LRL与n层的底部接触。 在一个示例中,LRL是其薄层电阻低于n型GnA层的薄层电阻的AlGaN / GaN超晶格结构。 LRL通过在n型GaN层下面横向导电来减少电流拥挤。 LRL通过防止下层GaN模板中的位错螺纹向上延伸到PAN结构中来降低缺陷密度。
    • 6. 发明申请
    • A BORON-CONTAINING BUFFER LAYER FOR GROWING GALLIUM NITRIDE ON SILICON
    • 一个含硼的缓冲层,用于在硅上生长氮化镓
    • WO2013019316A2
    • 2013-02-07
    • PCT/US2012/041726
    • 2012-06-08
    • BRIDGELUX, INC.FENWICK, William, E.
    • FENWICK, William, E.
    • H01L29/267H01L21/02381H01L21/02458H01L21/02502H01L21/0254H01L21/0262H01L33/007
    • A silicon wafer used in manufacturing GaN for LEDs includes a silicon substrate, a buffer layer of boron aluminum nitride (BxAli_xN) and an upper layer of GaN, for which 0.35≤x≤0.45. The BAIN forms a wurtzite-type crystal with a cell unit length about two-thirds of a silicon cell unit length on a Si (111) surface. The C- plane of the BAIN crystal has approximately one atom of boron for each two atoms of aluminum. Across the entire wafer substantially only nitrogen atoms of BAIN form bonds to the Si (111) surface, and substantially no aluminum or boron atoms of the BAIN are present in a bottom-most plane of atoms of the BAIN. A method of making the BAIN buffer layer includes preflowing a first amount of ammonia equaling less than 0.01% by volume of hydrogen flowing through a chamber before flowing trimethylaluminum and triethylboron and then a subsequent amount of ammonia through the chamber.
    • 用于制造LED的GaN的硅晶片包括硅衬底,氮化硼氮化物缓冲层(BxAli_xN)和上层GaN,其中0.35 = x = 0.45。 BAIN形成纤锌矿型晶体,其单元长度约为Si(111)表面上硅单元长度的三分之二。 BAIN晶体的C平面对于每两个铝原子具有约一个原子的硼。 在整个晶片中,基本上只有BAIN的氮原子与Si(111)表面形成键合,并且在BAIN原子的最底层平面上基本上不存在BAIN的铝或硼原子。 制备BAIN缓冲层的方法包括在流动三甲基铝和三乙基硼之前,预先流过流过室的氢的量小于0.01体积%的第一量的氨,然后通过该室预先排出一定数量的氨。