IEDM 2009 Conference: IQE materials featured in three papers presented by Purdue, Penn State and Cornell Universities.

10 December 2009

IQE’s materials featured in three research papers to be published at the International Electron Devices Meeting (IEDM) to be held in Baltimore, MD from 7th to 9th December 2009.
Researchers from Purdue University described a new damage-free dry and wet etching process with which they have built the first InGaAs FinFETs (transistors shaped like fins).
The FinFET devices manufactured on material produced at IQE’s facility in Bethlehem, PA were fabricated by researchers at Purdue University in Indianapolis. The transistors had very small dimensions with channel lengths down to 100nm and widths down to 40nm. The device comprised of three gates for better control of short-channel effects and electrical behaviour was well-controlled.
The paper: “First Experimental Demonstration of 100 nm Inversion-mode InGaAs FinFET through Damage-free Sidewall Etching,” is one of two presented by Purdue University researchers based on work conducted using IQE’s materials. The second paper is titled: “High-performance Deep-submicron Inversion-mode InGaAs MOSFETs with Maximum Gm exceeding 1.1 mS/µm: New HBr Pretreatment and Channel Engineering,”
Also at the same conference, a late-news paper was presented by Penn State University, Cornell University and IQE researchers. The paper: “Experimental Demonstration of 100nm Channel Length In0.53Ga0.47As-based Vertical Inter-band Tunnel Field Effect Transistors (TFETs) for Ultra Low-Power Logic and SRAM Applications,” addresses the need for ultra low-power devices and describes an interband tunnelling field effect transistor (TFET) built on InGaAs.
The TFET device described in the paper features an “on-current” of 20µA/µm at 0.75V and a large on-off current ratio of 104. This performance is particularly noteworthy given that the device channel length is only 100nm.

Technical/Sales: IQE Inc (+1 610 972 1488) Amy Liu
Press: IQE plc (+44 29 2083 9400) Chris Meadows

Note to editors
IQE is the leading global supplier of advanced semiconductor wafers with products that cover a diverse range of applications, supported by an innovative outsourced foundry services portfolio that allows the Group to provide a 'one stop shop' for the wafer needs of the world's leading semiconductor manufacturers.
IQE uses advanced crystal growth technology (epitaxy) to manufacture and supply bespoke semiconductor wafers ('epi-wafers') to the major chip manufacturing companies, who then use these wafers to make the chips which form the key components of virtually all high technology systems. IQE is unique in being able to supply wafers using all of the leading crystal growth technology platforms.
IQE's products are found in many leading-edge consumer, communication, computing and industrial applications, including a complete range of wafer products for the wireless industry, such as mobile handsets and wireless infrastructure, Wi-Fi, WiMAX, base stations, GPS, and satellite communications; optical communications, optical storage (CD, DVD), laser optical mouse, laser printers & photocopiers, thermal imagers, leading-edge medical products, barcode, ultra high brightness LEDs, a variety of advanced silicon based systems and high efficiency concentrator photovoltaic (CPV) solar cells.
The manufacturers of these chips are increasingly seeking to outsource wafer production to specialist foundries such as IQE in order to reduce overall wafer costs and accelerate time to market.
IQE also provides bespoke R&D services to deliver customised materials for specific applications and offers specialist technical staff to manufacture to specification either at its own facilities or on the customer's own sites. The Group is also able to leverage its global purchasing volumes to reduce the cost of raw materials. In this way IQE's outsourced services, provide compelling benefits in terms of flexibility and predictability of cost, thereby significantly reducing operating risk.
IQE operates six manufacturing facilities located in Cardiff (two) and Milton Keynes in the UK; in Bethlehem, Pennsylvania and Somerset, New Jersey in the USA; and Singapore. The Group also has 11 sales offices located in major economic centres worldwide.