Digital Signal Processing Reference
In-Depth Information
range. It is one of the best known organic semiconducting materials and most often
used for production. It has been already combined with n-type semiconductors for
making complementary transistor technologies.
The production of organic electronics technology can be done in several ways. A
short overview is given on the most important techniques. Besides thermal vacuum
evaporation or vapor-phase deposition also printing techniques exist that push ahead
the research on roll-to-roll printing.
The technology applied in this work was extensively discussed. The behavior of
both the 3-contact transistor and the 4-contact transistor with its additional backgate
were treated. Furthermore, the features of the 4-contact transistor were elucidated
through a set of practical application-oriented examples and it was demonstrated that
the 4-contact transistor performs better in every situation.
Next a short discussion was held about the non-ideal behavior that is present in the
technology. The sensitivity of the behavioral transistor parameters to the production
process was investigated and the effects that are present at runtime, such as bias stress
and influence by H
2
O, O
2
or temperature, were examined. The threshold voltage
V
T
is the most sensitive behavioral parameter. For analog circuit design
V
T
is therefore
predicted to be the most important parameter to deal with when optimizing the circuit
reliability.
Finally, also the realization of passive components in the applied organic elec-
tronics technology is examined. Resistors can best be constructed with transistors
biased in the linear regime yet their practicability is only moderate. Capacitors are
easily constructed with overlapping metal layers.
References
Bai Y.-W., Chen C.-Y (2007) Using serial resistors to reduce the power consumption of resistive
touch panels. In: IEEE International Symposium on Consumer Electronics ISCE 2007, pp. 1-6.
Bode D, Myny K, Verreet B, van der Putten B, Bakalov P, Steudel S, Smout S, Vicca P, Genoe J,
Heremans P (2010) Organic complementary oscillators with stage-delays below 1
μ
s. Appl Phys
Lett 96(13):133307
Bonse M, Thomasson DB, Klauk H, Gundlach DJ, Jackson TN (1998) Integrated a-Si:H/pentacene
inorganic/organic complementary circuits. In: International technical digest in electron devices
meeting IEDM '98, pp. 249-252.
Caboni A, Orgiu E, Barbaro M, Bonfiglio A (2009) Flexible organic Thin-Film transistors for pH
monitoring. IEEE Sens J 9(12):1963-1970
Cantatore E, Geuns TCT, Gelinck GH, van Veenendaal E, Gruijthuijsen AFA, Schrijnemakers L,
Drews S, de Leeuw DM (2007) A 13.56-MHz RFID system based on organic transponders. IEEE
J Solid-State Circuits, 42(1):84-92.
Chen H-Y, Patil N, Lin A, Wei L, Beasley C, Zhang J, Chen X, Wei H, Liyanage LS, Shulaker MM,
Mitra S, Philip Wong H-S (2011) Carbon electronics from material synthesis to circuit demon-
stration. In: International symposium on VLSI technology, systems and applications (VLSI-TSA)
2011, pp. 1-2.
Chua L-L, Zaumseil J, Chang J-F, Ou ECW, Ho PKH, Sirringhaus H, Friend RH (2005) General
observation of n-type field-effect behaviour in organic semiconductors. Nature 434(7030):194-
199
