摘要:
A radio frequency (“RF”) circuit configured in accordance with an embodiment of the invention is fabricated on a substrate using integrated passive device (“IPD”) process technology. The RF circuit (which may be, for example, a harmonic filter) includes at least one RF signal line section and an integrated RF coupler located proximate to the RF signal line section. The integrated RF coupler, its output and grounding contact pads, and its matching network are fabricated on the same substrate using the same IPD process technology. The integrated RF coupler provides efficient and reproducible RF coupling without increasing the die footprint of the RF circuit.
摘要:
A low subthreshold leakage current, p-channel HFET including a GaAs supporting substrate with a first GaAs buffer layer and a first Al.sub.0.75 Ga.sub.0.25 As diffusion barrier layer formed thereon and a low temperature grown layer, including one of GaAs and AlGaAs, grown at 200.degree. C. on the first diffusion barrier layer. A second Al.sub.0.75 Ga.sub.0.25 As diffusion barrier layer is positioned on the low temperature grown layer and a second GaAs buffer layer is grown on the second diffusion barrier layer. A p-channel HFET is formed on the second buffer layer.
摘要翻译:低亚阈值漏电流,p沟道HFET,包括具有第一GaAs缓冲层的GaAs支撑衬底和形成在其上的第一Al 0.75 Ga 0.25 As扩散阻挡层,以及包括GaAs和AlGaAs中的一种的低温生长层,其生长在 在第一扩散阻挡层上为200℃。 第二Al 0.75 Ga 0.25 As扩散阻挡层位于低温生长层上,第二GaAs缓冲层生长在第二扩散阻挡层上。 在第二缓冲层上形成p沟道HFET。
摘要:
A pseudomorphic high electron mobility transistor (pHEMT) comprises: a substrate comprising a Group III-V semiconductor material; buffer layer disposed over the substrate; and a channel layer disposed over the buffer layer. The buffer layer comprises microprecipitates of a Group V semiconductor element. A method of fabricating a pHEMT is also described.
摘要:
A pseudomorphic high electron mobility transistor (pHEMT) comprises: a substrate comprising a Group III-V semiconductor material; buffer layer disposed over the substrate; and a channel layer disposed over the buffer layer. The buffer layer comprises microprecipitates of a Group V semiconductor element. A method of fabricating a pHEMT is also described.
摘要:
A method of forming an electrically insulating layer (130) on a compound semiconductor (110) comprises: providing a compound semiconductor structure; preparing an upper surface (111) of the compound semiconductor structure to be chemically clean; forming a template (120) on the compound semiconductor structure using a first precursor in a metalorganic chemical vapor deposition (MOCVD) system or a chemical beam epitaxy (CBE) system; and introducing oxygen and a second precursor to the MOCVD system in order to form the electrically insulating layer.