Ostendo Technologies, Inc.

Kameshwar Yadavalli

Hussein S El-Ghoroury

Qian Fan

Andrew Teren

Benjamin A Haskell

Chih-Li Chuang

Gregory Batinica

Hailong Zhou

JeongHyuk Park

Clarence Crouch

Minghsuan Liu

Weilong Tang

A multilayer light emitting device having a plurality of low Si&#x2014;H bonding dielectric layers is disclosed for improved p-GaN contact performance. Improved p-side contact resistance is provided using one or more bonding, via or passivation layers in a multilayer light emitting structure by the use of processes and dielectric materials and precursors that provide dielectric layers with a hydrogen content of less than 13 at. %.

III-V light emitting device having low Si&#x2014;H bonding dielectric layers for improved P-side contact performance

Solid state light emitting micropixels array structures having hydrogen barrier layers to minimize or eliminate undesirable passivation of doped GaN structures due to hydrogen diffusion.

Device and method for III-V light emitting micropixel array device having hydrogen diffusion barrier layer

A III-V light emitting device with pixels (mesa regions) specifically designed to enable lower cost through layer vias is disclosed for reduced cost of manufacture of the device. Reduction of cost of manufacture is achieved by having non-uniform width trench regions formed during pixel etch for the multi-pixel array part of the device. Through-layer vias are specifically formed in the wider part of the trench regions using cheaper lithography toolset enabled by the larger via critical dimension achievable in the wider part of the trench regions (as compared to narrow part of the trench regions). Larger via critical dimension enables improved electrical (and consequently optical) performance of the device due to better overlay control as well as lower via resistance.

III-V light emitting device with pixels enabling lower cost through-layer vias

An electromagnetic wave irradiation apparatus and methods to bond unbonded areas in a bonded pair of substrates are disclosed. The unbonded areas between the substrates are eliminated by thermal activation in the unbonded areas induced by electromagnetic wave irradiation having a wavelength selected to effect a phonon or electron excitation. A first substrate of the bonded pair of substrates absorbs the electromagnetic radiation and a portion of a resulting thermal energy transfers to an interface of the bonded pair of substrates at the unbonded areas with sufficient flux to cause opposite sides the first and second substrates to interact and dehydrate to form a bond (e.g., Si&#x2014;O&#x2014;Si bond).

Apparatus and methods to remove unbonded areas within bonded substrates using localized electromagnetic wave annealing

A method to improve the planarity of a semiconductor wafer and an assembly made from the method. In a preferred embodiment of the method, a compressive PECVD oxide layer such as SiOhaving a predetermined thickness or pattern is deposited on the second surface of a semiconductor wafer having an undesirable warp or bow. The thickness or pattern of the deposited oxide layer is determined by the measured warp or bow of the semiconductor wafer. The compressive oxide layer induces an offsetting compressive force on the second surface of the semiconductor wafer to reduce the warp and bow across the major surface of the semiconductor wafer.

Methods for improving wafer planarity and bonded wafer assemblies made from the methods

Methods for bonding semiconductor wafers requiring the transfer of electrical and optical signals between the bonded wafers and across the bonding interface by interfusing optical interconnects on one wafer with optical interconnects on a second wafer, interfusing electrical interconnects on one wafer with electrical interconnects on the second wafer, and interfusing a dielectric intermediary bonding layer on one wafer with the dielectric intermediary bonding layer on the second wafer to bond the wafers together with electrical interconnections and optical interconnections between the wafers. The methods are also applicable to the bonding of semiconductor wafers to provide a high density of electrical interconnects between wafers.

Semiconductor wafer bonding incorporating electrical and optical interconnects

Methods for bonding semiconductor wafers requiring the transfer of electrical and optical signals between the bonded wafers and across the bonding interface. The methods incorporate the formation of both electrical and optical interconnect vias within the wafer bonding interface to transfer electrical and optical signals between the bonded wafers. The electrical vias are formed using multiplicity of metal posts each comprised of multiple layers of metal that are interfused across the bonding surface. The optical vias are formed using multiplicity of optical waveguides each comprised of a dielectric material that interfuses across the bonding interface and having an index of refraction that is higher than the index of refraction of the dielectric intermediary bonding layer between the bonded wafers. The electrical and optical vias are interspersed across the bonding surface between the bonded wafers to enable uniform transfer of both electrical and optical signals between the bonded wafers.

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Carlsbad, CA, United States of America

Kameshwar Yadavalli