Circuit Yield of Organic Integrated Electronics
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Circuit Yield of Organic Integrated Electronics ASIC Class Presentation By: Mohammad Mottaghi Based on a paper from ISSCC2003 All credits go to the original contributors.
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Circuit Yield of Organic Integrated Electronics. ASIC Class Presentation By: Mohammad Mottaghi Based on a paper from ISSCC2003 All credits go to the original contributors. Motivations for organic elec…. Organic TFTs show poor performance compared to silicon CMOS - PowerPoint PPT Presentation
Transcript of Circuit Yield of Organic Integrated Electronics
Circuit Yield of Organic Integrated Electronics
ASIC Class Presentation By:Mohammad Mottaghi
Based on a paper from ISSCC2003All credits go to the original
contributors.
Motivations for organic elec… Organic TFTs show poor performance
compared to silicon CMOS But organic TFTs also show the potential for
extremely low cost production (printing) Organic TFTs are in a stage of development
as silicon MOSFETs were 30 years ago Organic TFT electronics certainly will not replace CMOS But organic TFT electronics may open new low cost / low
performance (but high volume!) markets
Polymer electronics
Low-end, high volume electronic applications, based on: Mechanical flexibility Low-cost Large area
Potential applications: Electronic barcodes Memories Displays (e-paper)
E-paper
Key feature: solution processing
Materials and technology
Technology
Equivalent Circuit
Operation of the polymer transistor
Operation of the polymer transistor
Mobility of organic semiconductors
Applications of organic ICs
Block diagram of an identification tag
Design of organic identification tags
Design of organic identification tags
Design of organic identification tags
Design of organic identification tags
Characteristics of the code generators
Design of organic identification tags
The 48 bit identification IC
Yield of organic circuits
Measured code generator yield
Outline Introduction:
Applications of organic ICs Design of organic identification tags Yield of organic circuits:
Measurements Analysis Improvement by design
Conclusions
Yield of organic circuits Possible causes of yield loss
Hard faults Less then one vertical short /20mm2
Parameter spread is too large No experimental evidence
Parameter values result in small noise margin for the logic style used
Small parameter variations can make the gate fail
Yield of organic circuits Inverter intrinsic noise margin
Yield of organic circuits Inverter noise margin
Yield of organic circuits
How do transistor parameters influence the noise margin?
Yield of organic circuits
Yield of organic circuits Semiconductor conductivity
Yield of organic circuits Semiconductor mobility
Yield of organic circuits Inverter noise margin: Impact of technology and design parameters
Yield of organic circuits NAND noise margin
Yield of organic circuits NAND noise margin
Outline Introduction:
Applications of organic ICs Design of organic identification tags Yield of organic circuits:
Measurements Analysis Improvement by design
Conclusions
Yield of organic circuits Yield improvement by design Use of a level shifter to move the trip level
Yield of organic circuits Test vehicle: a shift register IC
Yield of organic circuits Test vehicle: a shift register IC
Yield of organic circuits Shift register IC: measurement results
Yield of organic circuits Output of a 32 stage shift register
employing level shifters
Largest organic circuit to date (1888 transistors)
Yield of organic circuits Shift register IC: preliminary yield
results Shift register without level shifter:
functional but still no circuit with more than two working FFs
Shift register with level shifter: 30% yield on the 32 FF circuit
Conclusions The main causes of the low yield have
been understood The new circuit solution shows a
substantially better yield The most complex organic circuit to
date has been measured
Thank you for your attention!
Any question ?
