Deposition of thin polytetrafluoroethylene (PTFE) films using fundamental pulses of a Nd3+: YAG laser

Polytetrafluoroethylene (PTFE) Top-Covered Mg-Ni Switchable Mirror Thin Films

“…As seen in the figure, the spectra of the deposited films have a characteristic absorption peaks peculiar to PTFE around at 1234 cm À1 . 8) This peak is ascribable to the stretching modes of C-F and C-C. Other characteristic absorption peaks of CF 2 groups at lower wavenumbers of 988 cm À1 (C-CF 3 vibration), 670 cm À1 (rocking and wagging modes of CF 2 ) are detected. In addition, the broad absorption bands from 1600 to 1800 cm À1 are detected, this may indicated that conjugated bonds, such as -FC=CF-(1730 cm À1 ) are formed during rf magnetron sputtering depositions.…”

“…8) PTFE films deposited by rf magnetron sputtering has a 90% optical transmittance in visible range. 9) And also this polymer has a various superior features, high thermal stability, chemical inertness, low surface tension and low coefficient of friction.…”

Laser ablation of polymers (review)

“…В ряде работ по абляционному формированию тонкослойных покрытий высказывались предположения о вторичной полимеризации крупных бирадикальных фрагментов на поверхности конденсации [8][9][10][11][12][13][14][15][16][17][18][19][20], в результате которой воспроизводится макромолекулярная цепь. Однако тщательный анализ результатов работ показывает, что ни в одной из них этот положение не имеет надежного экспериментального или теоретического обоснования, хотя и доказательств обратного не существует.…”

Pulsed Laser Deposition (PLD)

“…This technique also produced PTFE films using a third harmonic of Nd-YAG laser (355 nm) [122]. This approach enables the use of long-wavelength lasers exhibiting a lower fluence that induces less electronic excitation than conventional UV lasers below the emission wavelength of 300 nm.…”