1. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 1 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 1 Advances In Testing: New Techniques for Reducing the Cost of Test 4.28.2005 Presented by Jason Chonko, Sr. Applications Engineer

2. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 2 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 2 Agenda Introduction Quick optimization steps Measurement tuning Test sequencing New technologies for drastic reduction in test time Component test example Summary

3. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 3 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 3 New technology brings new challenges for test CCD image sensor LED flash External OLED Varistors, capacitors, inductors GMR heads in HDD for MP3 player Internal OLED Display driver ICs RFICs, PAs Keypad backlight Longer battery life New communication standards

4. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 4 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 4 Introduction

5. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 5 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 5 Quick Optimization Disable unused instrument functions –Displays –Beepers

6. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 6 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 6 Quick Optimization Avoid autoranging –Use fixed source and measurement ranges

7. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 7 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 7 Measurement Optimization

8. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 8 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 8 Measurement Optimization (Contd) Optimize integration setting (NPLC)

9. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 9 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 9 Measurement Optimization (Contd) Disable filtering, if not needed

10. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 10 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 10 Measurement Optimization (Contd) Disable autozero (zero reference measurement)

11. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 11 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 11 New Techniques

12. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 12 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 12 Typical Test Controlling PC Rack and Stack instruments connected to PC via communications bus (GPIB)

13. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 13 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 13 The Communications Bottleneck PC then must control many aspects of test Back-and-forth communication can be slow! PC triggering and decision making is slow! Tests are chatty: High frequency, small packet size USB and Ethernet are equivalent to GPIB speeds

14. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 14 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 14 New Alternatives New classes of instruments have distributed processors. Powerful features: –Lessen communications time by holding more of the test sequence in the instrument. –Powerful instrument level calculations and math capabilities enable extended control of digital I/O, and other resources can enhance total system throughput. SLOWFAST

15. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 15 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 15 Traditional LED Testing Forward voltage (Vf) Reverse leakage (Ir) Light intensity (L)

16. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 16 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 16 Alternative LED Tests Test sequence stored and controlled by processor in instruments. –Lessens communication frequency –Eases multi-instrument integration

17. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 17 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 17 The Keithley 2600 Series System SourceMeter®

18. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 18 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 18 Keithley Test Script Processor (TSP): High-speed automation Processor in instrument runs embedded test scripts –Create custom source-measure functions that are called from a single GPIB command –Create fully automated test scripts that run independent of a control PC Increases throughput –Eliminates GPIB traffic between instrument and PC –Automated tests are typically 10 times faster than PC controlled tests Easier to use than other instrument test sequencers –Intuitive language vs. cryptic commands –Test Script Builder development software creates, modifies, and debugs test scripts quickly startscript -- Declare variables OutputOn = 1 OutputOff = 0 Current = 0 Voltage = 0 -- Send SMU control commands smua.reset( ) smua.measure.nplc = 1.0 smua.source.rangev = 1.0 smua.measure.rangei = 1.0 -- Run simple sweep smua.source.output = OutputOn for Voltage = 1,10 do smua.source.levelv = Voltage Current = smua.measure.i( ) Resistance = Voltage / Current print ("Resistance=..Resistance) end smua.source.output = OutputOff endscript

19. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 19 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 19 Increased Scalability: TSPLink Expandable backplane: Keithley TSPLink TM Features: –Enables parallel or complicated test sequencing –Eases multiple instrument synchronization –Improves scalability over mainframe based test systems - No slot limits or backplane support issues

20. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 20 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 20 Summary Many settings and adjustments can be made to existing setups to increase throughput: –Disable displays and beepers –Disable autoranging: Use appropriate fixed ranges –Use filtering only if needed –Select correct measurement aperture (NPLC) for your measurement –Autozero may be disabled for short time periods with little effect on accuracy

21. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 21 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 21 Summary More powerful processors at the instrument are enabling high throughput and easing complicated testing procedures. Expandable backplanes, such as TSPlink TM, allow flexible and scalable test systems without the mainframe. Throughput can be further optimized by: –Keeping test sequence code simple. –Understanding your instruments capabilities.

22. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 22 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 22 Related Information from Keithley Application Notes: Increasing Production Throughput of Multi-pin Devices using a Keithley 2600 Series System SourceMeter Instruments Converting a Series Model 2400 SourceMeter SCPI Application to a Series Model 2600 System SourceMeter Script Application On-line seminars with additional testing techniques and solutions: Understanding Measurement Uncertainty Tips, Tricks, and Traps for Advanced SMU DC Measurements How to Make Sensitive DC Measurements How to Get the Most from Your Low Current Measurement Instruments Visit http://www.keithley.com for a collection of more than two dozen application noteshttp://www.keithley.com and tech briefs for making SMU measurements.

23. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 23 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 23 Contact Keithley with Your Questions: 1-888-KEITHLEY, ext. 3960, within the USA 001-440-248-0400 Outside the USA 010-82251886 in China 089/84 93 07-40 in Germany/Europe 0118-9 29 75 00 in Great Britain 3-5733-7555 in Japan 2-574-7778 in Korea 3-5729077 in Taiwan See www.keithley.com for additional worldwide officeswww.keithley.com Via e-mail to applications@keithley.comapplications@keithley.com

24. A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 24 A G R E A T E R M E A S U R E O F C O N F I D E N C E www.keithley.com 24 A Greater Measure of Confidence