Abstract

Flexible displays is an emerging technology in which devices are mounted on flexible substrates, generally plastic substrates rather than glass ones. Flexible displays have a compliant structure, very-thin profile, low weight, and ultimately low cost. However, although this technology shows a great promise, it is still nascent and therefore faces many challenges. One of the main challenges that results in performance degradation is sensitivity to ambient conditions. Flexible displays are susceptible to many types of stresses during processing and usage including mechanical, thermal, and chemical stresses. Tension, compression, and bending are examples of mechanical stresses that might cause failures when applied repeatedly during processing. In this work, design of experiments (DOE) methods were used to study the factors affecting the high cyclic bending fatigue of uniform copper thin films forming the back planes of flexible displays on polyethylene terephthalate (PET) substrates. A 2<i><sup>k-1</sup></i> fractional factorial design was implemented to investigate the significant parameter effect. The parameters investigated were temperature, humidity, bending radius, film thickness, and frequency. Initial results showed a great effect of temperature and bending radius on the bending fatigue life of such structures.

© 2010 IEEE

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  2. G. P. Crawford, Flexible Flat Panel Displays (Wiley, 2005).
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  15. S. K. Park, J. I. Han, D. G. Moon, W. K. Kim, "Mechanical stability of externally deformed indium-tin-oxide films on polymer substrates," Jpn. J. Appl. Phys. 42, 623-629 (2003).

2009 (1)

K. Alzoubi, S. Lu, B. Sammakia, M. Poliks, "Experimental study of the high cycle fatigue of thin film metal on polyethylene terephthalate for flexible electronics applications," IEEE Trans. Adv. Pkg. (2009).

2007 (2)

S. Grego, J. Lewis, E. Vick, D. Temple, "A method to evaluate mechanical performance of thin transparent films for flexible displays," Thin Solid Films 515, 4745-4752 (2007).

K. S. Al-Rubaie, L. B. Godefroid, J. A. M. Lopes, "Statistical modeling of fatigue crack growth rate in Inconel alloy 600," Int. J. Fatigue 29, 931-940 (2007).

2005 (1)

D. R. Cairns, G. P. Crawford, "Electromechanical properties of transparent conducting substrates for flexible electronic displays," Proc. IEEE 93, 1451-1458 (2005).

2004 (1)

S. L. Liu, G. Chen, M. S. Yong, "EMC characterization and process study for electronics packaging," Thin Solid Films 462–463, 454-458 (2004).

2003 (3)

D. Huang, F. Liao, S. Molesa, D. Redinger, V. Subramanian, "Plastic-compatible low resistance printable gold nanoparticle conductors for flexible electronics," J. Electrochem. Soc. 150, G412-G417 (2003).

S. K. Park, J. I. Han, D. G. Moon, W. K. Kim, "Mechanical stability of externally deformed indium-tin-oxide films on polymer substrates," Jpn. J. Appl. Phys. 42, 623-629 (2003).

J. Andersons, Y. Leterrier, I. Fescenko, "Analysis of the initial fragmentation stage of oxide coatings on polymer substrates under biaxial tension," Thin Solid Films 434, 203-215 (2003).

2001 (1)

Y. Leterrier, D. Pellaton, D. Mendels, R. Glauser, J. Andersons, J.-A. E. Månson, "Biaxial fragmentation of thin silicon oxide coatings on (polyethylene terephthalate)," J. Mater. Sci. 36, 2213-2225 (2001).

1998 (1)

A. Dasgupta, M. G. Pecht, B. Mathieu, "Design-of-experiment methods for computational parametric studies in electronic packaging," Finite Elements in Anal. Des. 30, 125-146 (1998).

Finite Elements in Anal. Des. (1)

A. Dasgupta, M. G. Pecht, B. Mathieu, "Design-of-experiment methods for computational parametric studies in electronic packaging," Finite Elements in Anal. Des. 30, 125-146 (1998).

IEEE Trans. Adv. Pkg. (1)

K. Alzoubi, S. Lu, B. Sammakia, M. Poliks, "Experimental study of the high cycle fatigue of thin film metal on polyethylene terephthalate for flexible electronics applications," IEEE Trans. Adv. Pkg. (2009).

Int. J. Fatigue (1)

K. S. Al-Rubaie, L. B. Godefroid, J. A. M. Lopes, "Statistical modeling of fatigue crack growth rate in Inconel alloy 600," Int. J. Fatigue 29, 931-940 (2007).

J. Electrochem. Soc. (1)

D. Huang, F. Liao, S. Molesa, D. Redinger, V. Subramanian, "Plastic-compatible low resistance printable gold nanoparticle conductors for flexible electronics," J. Electrochem. Soc. 150, G412-G417 (2003).

J. Mater. Sci. (1)

Y. Leterrier, D. Pellaton, D. Mendels, R. Glauser, J. Andersons, J.-A. E. Månson, "Biaxial fragmentation of thin silicon oxide coatings on (polyethylene terephthalate)," J. Mater. Sci. 36, 2213-2225 (2001).

Jpn. J. Appl. Phys. (1)

S. K. Park, J. I. Han, D. G. Moon, W. K. Kim, "Mechanical stability of externally deformed indium-tin-oxide films on polymer substrates," Jpn. J. Appl. Phys. 42, 623-629 (2003).

Proc. IEEE (1)

D. R. Cairns, G. P. Crawford, "Electromechanical properties of transparent conducting substrates for flexible electronic displays," Proc. IEEE 93, 1451-1458 (2005).

Thin Solid Films (3)

S. Grego, J. Lewis, E. Vick, D. Temple, "A method to evaluate mechanical performance of thin transparent films for flexible displays," Thin Solid Films 515, 4745-4752 (2007).

S. L. Liu, G. Chen, M. S. Yong, "EMC characterization and process study for electronics packaging," Thin Solid Films 462–463, 454-458 (2004).

J. Andersons, Y. Leterrier, I. Fescenko, "Analysis of the initial fragmentation stage of oxide coatings on polymer substrates under biaxial tension," Thin Solid Films 434, 203-215 (2003).

Other (5)

K. Alzoubi, S. Lu, B. Sammakia, M. Poliks, "Experimental study of the high cyclic bending fatigue of thin film metal on polyethylene terephthalate for flexible electronics applications," Proc. ASME 2009 InterPACK Conf. (IPACK2009) (2009).

K. Alzoubi, S. Lu, B. Sammakia, M. Poliks, "Factors effect study for the high cyclic bending fatigue of thin films on PET substrate using design of experiments tools," 9th Annu. Flexible Electron. and Displays Conf. (2010).

B. Holland, R. Mcpherson, T. Zhang, Z. Houl, R. Dean, R. Johnson, "Ultra-thin, flexible electronics," 2008 Electron. Compon. Technol. Conf. (2008) pp. 1110-1116.

D. Montgomery, Design and Analysis of Experiments (Wiley, 2000).

G. P. Crawford, Flexible Flat Panel Displays (Wiley, 2005).

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