Electrical characterization of Graphene and nano-devices. Stewart Wilson European Sales Manager Semiconductor Parametric Test Systems Autumn 2014.
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1 Electrical characterization of Graphene and nano-devices Stewart Wilson European Sales Manager Semiconductor Parametric Test Systems Autumn 2014.
2 Keysight role in Graphene/Nano technology science Keysight role in Graphene/Nano technology science Graphene of Graphene and Nano Devices Page 2
3 Keysight role in Graphene/Nano technology science Graphene of Graphene and Nano Devices Page 3
4 Keysight instruments for Graphene/Nano technology Parametric Analyzer Source/Measure Unit Pico-ammeter/Electrometer Pulse Generator Measurements Network Analyzer Oscilloscope Digital Multimeter Impedance / Material Analyzer LCR Bridge Power Supply Voltage/Current I/V curves Impedance Capacitance Resistance Conductance S-parameters Dielectric characteristics Frequency Response Time Response Pulse Stimulus DC power of Graphene and Nano Devices Page 4
5 Graphene Material Validation & Measurement Applications Instruments Measurements DC Characterization of Graphene structure Parametric Analyzer Sheet Resistance S-parameters Dielectric characteristics Frequency Response Time Response Pulse Stimulus DC power Mw & THz Graphene Characterization I Wave R Wave A Wave Network Analyzer T Wave Absorbing Materials Source/Measure Unit of Graphene and Nano Devices Page 5
6 Sheet resistance measurement Source/Measure Unit V +/- Vsub +/- Source/Measure Unit I +/- Source/Measure Unit of Graphene and Nano Devices Page 6
7 Graphene Transistor Devices Instruments Measurements DC Characterization I/V measurement C/V measurement Transconductance Parametric Analyzer RF & Mw Characterization S-parameters Ft Impedance measurement Frequency response Network Analyzer Source/Measure Unit of Graphene and Nano Devices Page 7
8 Carbon Nanotube/Graphene FET / SET Complete characterization of CNT FET s or SET s B1500A Semiconductor Device Analyzer SMU 1 Triaxial Cable Triaxial connector Force Guard Shielding box SMU 2 SMU 3 Force Guard Force Guard Drain Side Gate Co-axial Cable Source SMU 4 Carbon Nanotube SiO 2 Si Sub. Chuck S Circuit common Force Back Gate connection Back Gate Guard Chuck Guard Measurement details Keysight B1500A Semiconductor Device Analyzer Developed I-V curves using the built-in application software for CNT FET characterization Paper details Measuring CNT FET s and CNT SET s using the Keysight B1500A Web site: Application Note EN of Graphene and Nano Devices Page 8 Page 8
9 Keysight Parametric Test Solutions Wide variety of SMU solutions for your semiconductor business Analyzer series Bench top series B1500A Semiconductor Device Analyzer Modular B1505A (10kV/ 1500A) Power Device Analyzer / Curve Tracer Switch B290xA/B291xA Series SMU s B2960A Series low noise sources B2980A Series pico-ammeter/electrometer Tester E5260/70 Modular SMU Products E5250, B220x Switching Matrix 4080 Parametric Tester of Graphene and Nano Devices Page 9
10 Keysight B1500A Semiconductor Device Analyzer Parametric measurement solutions spanning the range from DC to fast pulsed measurement. Page 10
11 Overview of the Keysight B1500A Complete capacitance measurement solution QSCV using SMUs CV module for 1 khz to 5 MHz measurement Built-in CV compensation Automatic CV/IV switching Agilent 4294A driver (for up to 110 MHz CV or Cf) Versatile design Flexible: 10 module slots Large touch screen display Windows XP-based for easy workplace integration Integrated fast pulsed measurement Voltage pulsing and fast IV measurement in one module Fast: 1 ms spot and 100 ms 10-pt sweep measurement Test up to 10 channels in parallel Advanced measurement functions Linear/binary search Multi-channel sweep List Sweep Parallel test Direct control mode Range management EasyEXPERT software Intuitive interface >330 furnished application tests Built-in test sequencing & wafer prober control Easy data export Leading edge non-volatile memory test ±40 V pulsing capability 0.4 mv force voltage resolution 10 ns pulse widths Arbitrary waveform creation Up to 10 independent pulse channels Page 11
12 B1500A and EasyEXPERT Software form a Complete Parametric Analysis Solution Microsoft Windows-based EasyEXPERT software Over 300 furnished application tests Innovative task-based approach to parametric test Measure, append and repeat functions Built-in semi-auto wafer prober drivers Supported Functions: 1. Sweep 2. Multi-channel sweep 3. List sweep 4. Time sampling 5. 1 khz to 5 MHz CV 6. Quasi-static CV 7. Direct control 8. HV-SPGU Control Integrated switching matrix control for the B2200A, B2201A and E5250A Standby mode for circuit debug My Favorite Setup feature allows users to customize application tests Quick Test utility supports test sequencing without programming Data and setup information can be automatically saved or selectively saved after each measurement Intuitive GUI-based application test setup windows Can automatically export measurement data to external drives Page 12
13 B1500A s Hardware allows both DC and Fast Pulsed Measurements Medium Current SMU (50 µs Pulse MCSMU) Multi-frequency capacitance measurement unit (MFCMU) Medium power SMU (New MPSMU) High resolution SMU (HRSMU) High power SMU (HPSMU) Waveform Generator/ Fast Measurement Unit (WGFMU) High-Voltage Semiconductor Pulse Generator Unit (HVSPGU) 4.2 Amp ground unit (GNDU) Ten slot modular mainframe All SMU types are Kelvin (separate force and sense inputs) Page 13
14 Complete Capacitance Measurement Solution Page 14
15 B1500A Capacitance Measurement Coverage EasyEXPERT 5.50 QSCV B1500A (SMU) HFCV B1500A (MFCMU) Ultra-HFCV 4294A / E4990A(?) 1 khz Standard (>2nm) dielectrics Thin-gate (<2nm) dielectrics 5 MHz 110 MHz Page 15
16 B1500A Step Voltage QSCV Measurement Technique (Using SMUs): The step voltage technique is very similar to a standard voltage sweep. The difference is that at each point on the sweep the voltage is bumped and the resultant current (charge) is measured. The charge and voltage can then be used to determine capacitance at that point. Voltage Bump Measure Leakage C = D Q D V Vstep DV Delay Time Integration Time Measure DQ Page 16
17 B1500A QSCV Measurement Results A classic quasi-static CV curve. Page 17
18 B1500A Multi-frequency Capacitance Measurement Unit (MFCMU) Single slot module EasyEXPERT provides a PC-based GUI (including open/short/load calibration) 1 khz to 5 MHz measurement range Can supply up to ±100 V of DC bias (when used with the SMUs) Easy to superimpose HFCV and QSCV measurements QSCV response HFCV response Page 18
19 You Can Easily Perform Automated Parameter Extraction on CV Curves Using EasyEXPERT All important device parameters calculated in a matter of seconds. Page 19
20 SMU CMU Unify Unit (SCUU) Provides CV-IV Switching and Supports IV Measurements to 1 fa MFCMU SMUs Outputs converted to two pairs of triaxial outputs (Force & Sense) Note: When using the SCUU with the SCUU cable capacitance compensation is automatic. The cable length is detected at boot-up and built-in compensation routines compensate to the output of the SCUU. Page 20
21 The B1500A Offers Complete Measurement Coverage From DC to Ultra-fast Pulsed IV Measurement Range 1 A SMU/MCSMU: Technology development Process integration Incoming inspection Failure analysis Reliability test Device modeling NVM cell test Nano device and material research Quasi-static CV Timing on-the-fly NBTI WGFMU: Ultra-fast NBTI General pulsed IV RTS measurement Advanced NVM (PRAM, ReRAM) MEMS capacitor characterization All fast time-domain measurement B1542A pulsed IV: SOI transistor test High-k gate transistor test 0.1 fa 1ms 100us 10us 1us 100ns 10ns Minimum Pulsing capability Page 21
22 What is Driving the Need for Fast Pulsed Measurement? New reliability tests (NBTI/PBTI) require spot and sweep measurements to be made in a few microseconds The transient current consumed by memory arrays can be quite large, and characterizing these current spikes requires current measurements to be made in one microsecond or less. Characterization of SOI MOSFETs requires pulsed measurement in the nanosecond range to prevent device self-heating effects from distorting the measurement results Characterization of high-k gate dielectric MOSFETs requires pulsed measurement in the nanosecond range to remove the effects of electron trapping in the gate oxide due to electron tunneling.r&d for novel devices or materials (MEMS, Organic Transistor, etc.) and many other newly discovered phenomena (such as random telegraph signal noise) require very fast current and voltage Page 22
23 Issues in Advanced process devices #1:SOI High thermal resistance Source n+ p p n+ SiO 2 p-si Gate Drain MOS-FET on SOI Self-heating effect Drain current decrease #3:HEMT Current Collapse Trapped charge GaN HEMT Drain current decrease Self-heating effect & Current collapse #2:High-k Gate Ef High-K p-si Ec Ev Drain current decrease #4:Nano Electrons trapped in the AlGaN surface states influence the electronic fielf applied to the channel Joule heating effects damage small nanodevices Damage/ Destroy DUT Barrier Oxide MOS-FET with High-k Gate dielectrics Trapped electron & Gate leakage Electrons trapped in the boundary defects influence the electronic filed applied to the channel. Joule heating effect Page 23
24 Keysight has a complete line of Pulsed IV solutions B1542A Pulsed IV Parametric Test Solution Agilent IV solutions Ultra Narrow Pulse IV solution for SOI/High-k devices +/- 4.5V pulses for the gate and +/-10V and 80mA for the drain 10ns gate pulse width with 2ns rise and fall times 1uA current measurement resolution B1530A WGFMU Pulsed IV Solution High resolution Pulse IV solution for advanced process devices +/-10V for gate/drain and drain current up to 10mA 100ns pulse width 2nA current measurement resolution B1542A B1530A New B1514A MCSMU Module 50us, 30V to be discussed later B1525A SPGU Pulsed IV Solution Higher Voltage/Current Pulse IV solution for HEMT or Power device +/-40V for gate/drain and drain current up to 400mA 5us pulse width 40uA current measurement resolution B1525A Page 24
25 B1542A Pulsed IV Parametric Test Solution Target Application Id-Vd and Id-Vg measurement with pulse gate bias for the SOI or highk gate dielectrics MOSFET. Benefits Ultra narrow pulses reduces the self-heating effects and the incidence of electron trapping for SOI transistors and high-k gate dielectric transistors respectively Capability to apply 10ns gate pulse width with 2ns rise and fall times Complete package contains all instruments, cables, connectors and software needed for PIV System cabling to keep impedance matching for uncluttered pulse shape down to 10ns pulse width with 2ns rise/fall time Specially designed Bias-T to make pulse top flat Feedback loop enables accurate Id-Vd and Id-Vg measurement Page 25
26 B1542A Pulsed IV solution - System Configuration Keysight 81110A Pulse Generator Keysight DSO90254A 2.5 GHz Digital Storage Oscilloscope Pulse Splitting Tee Gate Pulse Output Ch RF coaxial cable RF coaxial cable Gate Pulse Monitor Ch Terminator DUT G D S Drain Current Monitor Ch Bias-T RF coaxial cable DC Bias Ch from SMU Triaxial cable Keysight B1500A Semiconductor Device Analyzer System configuration keeping impedance matching everywhere Page 26
27 B1542A Pulsed IV solution - Effect of Pulsed IV for SOI/SSOI Drain Current, Id [ma/mm] Strained-SOI SOI Vg=1.15V 18% 11% 0.2 Pulsed Static Drain Voltage, Vd [V] Reference: High Performance and New Structure CMOS Device Technology for the leading edge LSI by Shinichi Takagi from MIRAI project, at Agilent AMF2006 in Japan Page 27
28 B1530A WGFMU Pulsed IV Solution B1530A Target Application Nanoscale devices such as carbon nanotubes, semiconductor nanowires, graphene-based electronics, molecular organic-based electronics, single electron devices and advanced semiconductor devices NBTI & PBTI Reliability measurements plus Random Telegraph Signal Noise Measurements. Benefits Capability to measure small current/voltage due to the necessity of applying very small voltage pulses to reduce the Joule heating effects Current measurement range: 10uA 10mA Effective resolution: 0.2% of range (Minimum 2nA) Easy to use B1530A WGFMU Pulsed IV Solution does NOT require any external equipment and messy cablings because of the capabilities for both pulse generation and precise measurement on one channel Page 28
29 B1530A B1530A WGFMU (Waveform Generator/Fast Measurement Unit ) Offer the combination of arbitrary linear waveform generation (ALWG) with synchronized fast and precise current or voltage (IV) measurement Optional module for B1500A Compact solution without any external equipment Multi-channel parallel testing for up to 9 devices B1530A Minimum Pulse Width:100ns Up to 10V/10mA output 200MHz samp/s 2nA current measurement resolution 2ch/Module Upgradable for existing B1500A mainframe Up to 5 modules Page 29
30 B1530A WGFMU Pulsed IV solution - System Configuration (1) : For RF Probes B1530A -The B1530A includes WGFMU module, two RSU and two cables between WGFMU and RSU. * Doesn t include the cables from RSU-output and RF-Probe A (Tri-ax cable) MPSMU MPSMU B1530A WGFMU Trigger-out Sync-out Sync-in Ch1 [BNC] V Monitor To SMU [Tri-ax] Output To WGFMU [D-Sub] [SMA] V Monitor To SMU Output To WGFMU Ch2 B1530A-002/003/005 (3.0m/5.0m/1.5m) 16493R-302 x2 (SMA-SMA:20cm:1ea) [SMA] 16493R-802 x2 (Magnet Stand:1ea) RF Probes B1500A -Some prober vendors can provide the cables between RSU/Probes and also Probes. Please contact prober vendor. Page 30
31 B1530A WGFMU Pulsed IV solution - System Configuration (2) : For DC Probes B1530A -The B1530A/B1530A-FG includes WGFMU module, two RSU and two cables between WGFMU and RSU. * Doesn t include the cables from RSU-output and DC-Probe, and SSMC cable. MPSMU MPSMU B1530A WGFMU Trigger-out Sync-out Sync-in Ch A (Tri-ax cable) 001:1.5m, 002:3m, 005:4m [BNC] To SMU [Tri-ax] [D-Sub] V Monitor To WGFMU RSU Output [SMA] RSU V Monitor To SMU Output To WGFMU Ch2 B1530A-002/003/005 (3.0m/5.0m/1.5m) 16493R-202 (SMA-SSMC:20cm:1ea) B1500A DC Probes [SSMC] -Some prober vendors can provide the cables between RSU/Probes and also Probes. Please contact prober vendor R-101/102 (SSMC-SSMC:5cm/7cm:1ea) 16493R-101/102 are to keep the ground return path. of Graphene and Nano Devices Page 31
32 B1530A B1530A WGFMU PIV Solution - Example of Measurement Data -1.E-03-9.E-04-8.E-04 Id (A) -7.E-04-6.E-04-5.E-04-4.E-04-3.E-04-2.E-04-1.E us Step (Reference) 1 us Step 1 us Pulse Gate Drain 5us 100mV 1V 0.E Vg (V) Note: 100us Step measurement was done by SMU 1us Step & 1us Pulse measurement was done by B1530A WGFMU Page 32
33 B1530A WGFMU Can Make Random Telegraph Signal Noise Measurements Convert to Frequency Domain Spectral Density Plot Page 33
34 B1525A HV-SPGU Pulsed IV Solution for High Voltage/High Current applications Target Application High Voltage/Current Pulsed IV, such as characterization for HEMTs Benefits Evaluate High power devices by minimizing the self-heating effect Able to apply gate/drain pulses up to 40V and drain current up to 400mA Wide rage of pulse width from 5 us to 10 s Easy to use & economical solution Require only one B1525A module for three terminal devices No need any external equipment and complex cabling GUI-based sample Application Tests run on EasyEXPERT B1525A Page 34
35 B1525A SPGU (Semiconductor Pulse Generator Unit) A fully integrated high-voltage pulse generator unit module B1525A Two channels per module Up to 5 modules (10 channels) per B1500A ± 40V pulse supply capability Superior pulse level accuracy Three-level pulse and open-state pulse capability on each channel Complex waveform generation B1525A Timing Gen. Output Voltage Monitor Ch1 Ch2 Integrated into B1500A EasyEXPERT software Pulse Source Output Impedance Output SPGU voltage monitor function (industry first function!) Amplifier HV-SPGU 50W Output Channel Page 35
36 A One Million Cycle Write/Erase Endurance Test Can be Completed in Hours Rather Than Days! % of Write/ Erase Cycles Completed is Displayed Written Vth Erased Vth Written/Erased Vth Separation Over Time Page 36
37 B1500A 50 µsec Pulse MCSMU Expands your choice of Pulsed IV up to 30V/1A All the parameters for Pulsed IV parametric test can be easily set and changed. Tracer test mode/osc view Application test mode User can optimize the timing parameters such as integ time and delay for the best measurement. Oscilloscope view gives you more confidence for the pulse measurement of MCSMU by optimizing timing parameters with monitoring actual V/I waveform that has been impossible before GUI-based dedicated Application test for pulsed Id-Vd or Id -Vg makes taskoriented approach also to fast pulsed IV measurement as easy as Page 37
38 Parametric Measurement Handbook & Impedance Measurement Handbook Available 200+ pages of invaluable information on parametric test You can request it online: You can also request a copy by completing the evaluation form. Page 38
39 Questions? Page 39
40 Thank you for your kind attention Page 40
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