摘要:
A method cold-melts a high conductivity region between a high-resistivity silicon substrate and a gallium-nitride layer to form a trap rich region that substantially immobilizes charge carriers in that region. Such a process should substantially mitigate the parasitic impact of that region on circuits formed at least in part by the gallium-nitride layer.
摘要:
A semiconductor device may include a semiconductor substrate, and a plurality of field effect transistors (FETs) on the semiconductor substrate. Each FET may include a gate, spaced apart source and drain regions on opposite sides of the gate, upper and lower vertically stacked superlattice layers and a bulk semiconductor layer therebetween between the source and drain regions, and a halo implant having a peak concentration vertically confined in the bulk semiconductor layer between the upper and lower superlattices.
摘要:
An embodiment includes a device comprising: a first epitaxial layer, coupled to a substrate, having a first lattice constant; a second epitaxial layer, on the first layer, having a second lattice constant; a third epitaxial layer, contacting an upper surface of the second layer, having a third lattice constant unequal to the second lattice constant; and an epitaxial device layer, on the third layer, including a channel region; wherein (a) the first layer is relaxed and includes defects, (b) the second layer is compressive strained and the third layer is tensile strained, and (c) the first, second, third, and device layers are all included in a trench. Other embodiments are described herein.
摘要:
A semiconductor apparatus (10) includes: a layered structure (100) that includes double junction structures that have a first junction (151, 153) where a wide-bandgap layer (102, 104) and a narrow- bandgap layer (101, 103, 105) are layered on each other and a second junction (152, 154) where a narrow-bandgap layer (101, 103, 105) and a wide-bandgap layer (102, 104) are layered on each other, and electrode semiconductor layers (110, 120) are joined to each layer of the layered structure. Each double junction structure includes a pair of a first region (131, 133) that has negative fixed charge and a second region (132, 134) that has positive fixed charge. The first region is closer to the first junction than to a center of the wide- bandgap layer. The second region is closer to the second junction than to the center of the wide-bandgap layer. A 2DEG or a 2DHG is formed at each junction. The semiconductor apparatus functions as an electric energy storage device such as a capacitor.
摘要:
シリコン基板を下地基板とし、クラックフリーでありかつ耐電圧性の優れたエピタキシャル基板を提供する。(111)方位の単結晶シリコン下地基板の上に、基板面に対し(0001)結晶面が略平行となるようにIII族窒化物層群を形成してなるエピタキシャル基板を、AlNからなる第1組成層とAl x Ga 1-x N(0≦x<1)からなる第2組成層とを交互に積層してなる組成変調層を複数備えるバッファ層と、バッファ層の上に形成された結晶層と、を備え、第1組成層と第2組成層の積層数をそれぞれnとし、下地基板の側からi番目の第2組成層におけるxの値をx(i)とするときに、x(1)≧x(2)≧・・・≧x(n-1)≧x(n)かつ、x(1)>x(n)であり、それぞれの第2組成層が第1組成層に対してコヒーレントな状態であるように形成する。
摘要翻译:公开了一种无硅外延基板,其使用硅基板作为基底基板并且具有优异的耐受电压。 具体公开的是通过在(111)单晶硅基底基板上形成一组III族氮化物层使得(0001)晶面大致平行于衬底表面而获得的外延衬底。 外延衬底包括:缓冲层,其包括多个组成调制层,其中由AlN形成的第一组成层和由Al x Ga 1-x N(其中0 = x <1)形成的第二组成层交替层叠; 以及形成在缓冲层上的晶体层。 当层叠的第一组合物层和第二组合物层的相应数目由n表示时,第i组合物层中的从基底的x的值由x(i)表示,x(1)= x (2)= ... = x(n-1)= x(n)和x(1)> x(n)。 第二组合物层与第一组合物层是相干的。
摘要:
A quantum well transistor has a germanium quantum well channel region. A silicon-containing etch stop layer provides easy placement of a gate dielectric close to the channel. A group III-V barrier layer adds strain to the channel. Graded silicon germanium layers above and below the channel region improve performance. Multiple gate dielectric materials allow use of a high-k value gate dielectric.