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    • 28. 发明公开
    • 반도체 결정의 제조 방법
    • 制备半导体晶体的方法
    • KR1020040010271A
    • 2004-01-31
    • KR1020030049557
    • 2003-07-19
    • 도요다 고세이 가부시키가이샤
    • 나가이세이지고지마아끼라도미따가즈요시
    • H01L21/324
    • C30B29/406C30B25/02C30B25/18C30B29/403H01L21/0237H01L21/0242H01L21/02458H01L21/02502H01L21/0254H01L21/0262H01L21/02639H01L21/0265
    • PURPOSE: To obtain a high-quality semiconductor crystal which is independent of a substrate. CONSTITUTION: A seed layer comprising a GaN layer 103 (a second layer of the seed layer) and an AlN buffer layer 102 (a first layer of the seed layer) are deposited onto a sapphire substrate 101, and its surface is etched in a striped manner with a stripe width(seed width) S of about 5 μm, a wing width W of about 15 μm and a depth of about 0.5 μm. This forms mesas with rectangular cross-sections, erosion remainder parts having the multilayered seed layer at their flat top parts are positioned at a cycle L of about20 μm, and the sapphire substrate 101 is partially exposed at trough parts of the wing. Preferably, the ratio S/W of the seed width to the wing width is from 1/3 to 1/5. Next, the semiconductor crystal A is grown to >=50 μm and separated from the substrate to obtain the high-quality single crystal independent of the substrate. By employing a halide vapor phase growth method and a V-III ratio of 30-80, the semiconductor crystal A having no crack is obtained.
    • 目的:获得独立于基板的高品质半导体晶体。 构成:将包含GaN层103(种子层的第二层)和AlN缓冲层102(种子层的第一层)的种子层沉积在蓝宝石衬底101上,并将其表面以条纹 方式具有约5μm的条纹宽度(种子宽度)S,约15μm的翼宽度W和约0.5μm的深度。 这形成具有矩形横截面的台面,其平顶部具有多层种子层的侵蚀剩余部分位于约20μm的周期L处,并且蓝宝石衬底101部分地暴露在翼的槽部分。 优选地,种子宽度与机翼宽度的比率S / W为1/3至1/5。 接下来,将半导体晶体A生长至> =50μm并与衬底分离以获得独立于衬底的高质量单晶。 通过使用卤化物气相生长法和30〜80的V-III比,可以得到没有裂纹的半导体晶体A.