OMMIC Innovating with III-V s OMMIC OMMIC
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1 Innovating with III-V s
2 Innovating with III-V s Mixed D/A ED02AH process for radar control functions and new GaN/Si for hyper-frequency power applications
3 Innovating with III-V s Europe s Independant IIIV Full-Service Foundry 3
4 Innovating with III-V s PROCESS 4
5 Innovating with III-V s 5 ED02AH D/A mixed process for control functions
6 Innovating with III-V s Introduction III/V provide optimum trade-offs in terms NF, gain, power and linearity for various applications including wireless telecommunication infrastructure, security scanners, radars and instrumentation. 6 A weaker feature of III/V technologies limited level of integration. We will show how E/D PHEMT processes enable the integration of analogue functions like phase shifters and attenuators with serial to parallel converters E/D Serial ctrl High integration cost reduction All integrated on the same chip to achieve state of the art performance through the example of Corechips.
7 Innovating with III-V s Electonically steerable antenna example 7 The orientation of the beam is obtained by the use of variable phase shifters attached to each radiating element The side lobes may then be controlled by variable attenuators attached to each element
8 Innovating with III-V s Electonically steerable antenna example 8 Each antenna element may contain : A variable phase shifter A variable attenuator Switches, to be able to use the same system in receive or transmit modes Amplifiers: to compensate the losses and create some gain, to reduce the noise in receive mode, to create enough power to drive power amplifiers in transmit mode Digital Contol
9 Innovating with III-V s From single function to multiple function chip 9 Due to higher frequency of radar application, integration of functions become a key aspect of designs. Below is the X band example Single functions already exists LNA Dig Ph Shifters Dig Attenuators MPA 3.74mm² 5.1mm² 3.12mm² 2.9mm² X band LNA X band Ph shifter X band Attenuator X band MPA 32dB gain 1.1dB NF 6 bit parallel control 6 bit parallel control 23dBm Psat
10 Innovating with III-V s Serial Interface need : 6 bit corechip example With 12 bits (or more) for a full core chip, we are faced with a connection problem: 10 Up to 24 pads (2 per bit if +/- control is required) to drive the 12 bits 24 bonding wires per circuit, multiplied by hundreds of circuits The solution is to place the SIPO on the chip Only one PIN to control all bits through Serial Input Parallel Output
11 Innovating with III-V s From single function to multiple function chip 11 Due to higher frequency of radar application, integration of functions become a key aspect of designs. Below is the X band example Single functions already exists LNA Dig Ph Shifters Dig Attenuators MPA 3.74mm² 5.1mm² 3.12mm² 2.9mm² X band LNA X band Ph shifter X band Attenuator X band MPA 32dB gain 1.1dB NF 6 bit parallel control 6 bit parallel control 23dBm Psat
12 Innovating with III-V s Multiple Cascaded devices : The SIPO Advantage 12 Clock Latch Enable Data In SIPO SIPO SIPO Data out Phase Control Amplitude control Phase Control Amplitude control Phase Control Amplitude control N devices to control : 2 x 6 x N wires for Parallel controled devices Only 3 wires for cascaded SIPO enabled devices
13 Innovating with III-V s How to realize the SIPO Efficient SIPO on chip requires Enhancement mode process 13 With D-mode transistors Requires negative supply + DC level shifting With E-mode transistors Direct coupling
14 Innovating with III-V s E/D process : ED02AH 14 Hetero-epitaxy with a pseudomorphic (GaInAs) active layer 0.18µm gate length (60 GHz Ft) Depletion and Enhancement mode recessed transistors: Vt=0.225V or -0.9V 2 types of diodes (0.18µm "GM" and 3µm "BE") for mixing, level shifting, or varactors. 3 types of Resistors : 40, 200 or 500 Ohms.square 2 types of MIM Capacitors : 50 or 400 pf/mm2 Full SiN + SiO2 + SiN protection ensuring high reliability SiO2/SiN + air bridge isolation between layers to reduce the parasitic capacitances. 1.25µm or 2.5µm thick gold metallisation for interconnections and spiral inductors. Via holes through the 100µm substrate to reduce parasitic inductances to ground.
15 Innovating with III-V s Examples of SIPOs bits SIPO
16 Innovating with III-V s Examples of X band Corechips 16
17 Innovating with III-V s Examples of X band Corechips 17 Separated register for Rx and Tx External additional attenuators
18 Innovating with III-V s Nowadays brand new 35GHz Corechip 18 Phase Shift ( ) Attenuation (db) 0,00-20,00-40,00-60,00-80,00-100,00-120,00-140,00-160,00-180,00-200,00-220,00-240,00-260,00-280,00 Rx in -300,00-320,00-340,00-360,00 Tx out Rx in Tx out LNA T/R Chip OMM9650UH PA LNA 34 34,2 34,4 34,6 34, ,2 35,4 PA 35,6 35,8 36 Frequency (GHz) P.Sat : 25dBm G : 26dB NF : 1,1dB P.sat : 37dBm NF : 3.5dB G : 30dB G : 19dB G : 26dB LNA CGY2134UH ,2 34,4 34,6 34, ,2 35,4 35,6 35,8 36 Frequency(GHz) Option 2 PA CGY2138UH Core Chip CGY2350UH 5Bits dB 5.6 LSB 0.5dB LSB Serial Control Rx / Tx Ka Band Chipset
19 Innovating with III-V s Corechip offer More than 15 Core chip in production from C band to Ka Band More than 40 Custom Corchip designed for customers 19 Packaged in HTCC QFN Packaged version in dev
20 Innovating with III-V s future control function 20
21 Innovating with III-V s 21
22 Innovating with III-V s mmw GaN HEMT on Si : Goal 22 The choice of a GaN heterostructure on Si is dictated by the following points: Increase power density 3 times the current GaAs technology Address applications up to 20W, compatible with the Si Thermal conductance, primarily targeting frequency bands from 15 GHz and 100 GHz. Access to the epitaxial material without depending on SiC sources Full replacement of GaAs processes for professional applications up to 100GHz at a lower cost/mm2
23 Innovating with III-V s mmw GaN HEMT on Si 23
24 Innovating with III-V s Advanced release of GaN/Si process Preliminary Design Kit available under ADS or AWR 24 D01GH : Applications : High frequency Power Amplifiers 10GHz to 94 GHz Robust Low Noise Amplifiers (< 20 GHz) Robust Control Functions High Linearity Mixers 0.11 µm gate (GaN on Si)
25 Innovating with III-V s D01GH Key power applications and targets 25 Scaled GaN /Si ( 30% shorter gate) can replace GaAs and InP for power applications with following power capability : 1 94GHz 6 45GHz 12 30GHz 25 10GHz 3 KEY features are required : In situ SiN passivation ( reduced lag effects in planar structure) Si substrate with proprietary buffer and extension to 6 inch Regrown ohmics ( for high gm and low noise)
26 Innovating with III-V s D01GH PROCESS FLOW 26 2x70um HEMT
27 Innovating with III-V s Thank you for your attention
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