Power Components

Kyma Demonstrates High Quality 200-mm GaN on QST® Templates

Kyma Technologies, Inc. has used its new K200™ hydride vapor phase epitaxy (HVPE) growth tool to produce high quality 200-mm diameter HVPE GaN on QST® (QROMIS Substrate Technology) templates.

Pictured above is one of the demonstrated 200-mm diameter HVPE GaN on QST® templates which consists of 10 microns of HVPE GaN grown on a 5 micron MOCVD GaN on QST® wafer provided by QROMIS, Inc.

Today’s announcement of Kyma’s development of 200-mm diameter GaN on QST® templates follows its announcement in 2016 of its demonstration of 150-mm diameter GaN on QST® templates in partnership with QROMIS, Inc. (formerly Quora Technology, Inc.) and its recent announcement of the commissioning of Kyma’s K200™ HVPE growth tool.

X-ray diffraction rocking curve linewidths for the templates fall in the range of 250 and 330 arc-sec for the symmetric {002) and asymmetric {102} XRD peaks, respectively, which is consistent with high structural quality. Low wafer bow (~50 microns) and smooth surface morphology suggest these materials should support high performance device manufacturing.

Kyma’s newly constructed K200™ HVPE tool represents a first for the industry and was designed by Kyma engineers to enable uniform and rapid growth of high quality GaN on a number of different substrates.

Keith Evans

Keith Evans, President & CEO, commented, “We have successfully transferred the process for making high quality GaN to our K200™ HVPE tool. The structural quality of the GaN produced on QROMIS’ QST® substrate is excellent. We are currently engaging with customers interested in large diameter GaN on QST® templates.”

Kyma and Qromis are partnered for this work under a Kyma-led US DOE Phase IIB SBIR with award number DE-SC0009653.

QROMIS recently began manufacturing 200-mm QST® substrates and GaN-on-QST® wafers using its foundry partner Vanguard International Semiconductor (VIS). VIS is planning to offer GaN power device manufacturing services on 8-inch diameter QST® platform in 2018.

Cem Basceri

QROMIS co-founder & CEO Cem Basceri added, “QROMIS’ CMOS fab-friendly 200-mm diameter QST® substrates and GaN-on-QST® wafers represent a disruptive technology, enabling GaN epitaxy from a few microns to hundreds of microns for GaN power applications ranging from 100V to 1,500V or beyond in lateral, quasi vertical or vertical device forms, and device manufacturing on the same 8-inch or 12-inch diameter platform at Si power device cost.

“Kyma’s K200™ HVPE technology represent an important value-add to QST®-based GaN power device manufacturing by enabling the low cost deposition of a thicker and lower defect density GaN surface than is practically achievable using MOCVD growth alone,” concluded Basceri.

Kyma is also teamed with a world-class semiconductor equipment OEM to manufacture K200™ HVPE tools for customers who prefer to bring Kyma’s leading HVPE GaN growth process in-house.

Kyma Technologies, Inc. , Qromis
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