Thermal pulse measurements on electron-beam irradiated fluoroethylene-propylene copolymer

Giacometti, J.A.; Minami, G.; Reggi, A.S. De; Dickens, Brian; Chinaglia, Dante Luís

doi:10.1109/ise.1994.514770

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The negative peak near z = 0 found by LIMM appears only in the case in which the electron beam penetrates the metallized side of the sample. The hypothesis that this overshoot corresponds to a negative-charge layer was supported by LIMM simulations by means of simple boxshaped profiles for the space-charge distribution and also by investigations of Giacometti et al [36].…”

Section: Discussionmentioning

confidence: 79%

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A comparison of space-charge distributions in electron-beam irradiated FEP obtained by using heat-wave and pressure-pulse techniques

Bloss

Steffen

Schäfer

et al. 1997

J. Phys. D: Appl. Phys.

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In the present paper, heat wave (LIMM) and pressure pulse (LIPP) measurements of the space-charge distributions in electron-beam irradiated Teflon FEP ( thick) are reported. The space-charge profiles obtained by the two methods are compared over the whole sample thickness. From the LIMM with the back surface heat sink, the space-charge distribution can be found from the surface of illumination up to at least half of the sample thickness. For the position of the bulk space charge, the heat wave and LIPP response results agree with each other to within . By using LIMM, an additional negative charge layer near the surface is found if the electron-beam irradiation is carried out through the metallized sample surface.

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Section: Discussionmentioning

confidence: 79%

“…Thus, a positive and a negative charge layer are near the surface. Also thermal pulse measurements from Giacometti et al [36] support this hypothesis. They found a thickness of the positive-charge layer of about 2 µm.…”

Section: A Comparison Of the Space-charge Distributionsmentioning

confidence: 78%

A comparison of space-charge distributions in electron-beam irradiated FEP obtained by using heat-wave and pressure-pulse techniques

Bloss

Steffen

Schäfer

et al. 1997

J. Phys. D: Appl. Phys.

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“…Such phenomena were also observed in ion-beam and direct current (dc) charged samples [9]. The accumulated positive charge was detected near the metallized side about 2 µm in the electron-beam poled, one-sided metallized fluoro-ethylenepropylene polymer film [10,11]. In recent studies, plasma-generated positive charges were found in RF plasma treated films.…”

Section: Introductionmentioning

confidence: 77%

Negative corona charge stability in plasma treated polytetrafluoroethylene teflon films

Chen¹

2004

J. Phys. D: Appl. Phys.

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In recent work, we found that the stability of the negative corona charge in radio frequency plasma treated polytetrafluoroethylene (PTFE) films (18 µm thickness) strongly depends on the plasma sources, the exposure time and the condition of the film in the plasma, i.e. the film orientation on the holder and whether the film is one-sided metallized or non-metallized, as well as the film side for corona charged. Using Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy, we conclude that two factors affect the negative charge stability: oxide formed on the surface and positive charges trapped in the film. The oxides serve to retain the negative corona charges and the plasma-generated positive charges recombine with the negative corona charges and cause the corona charge discharge after heating.

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Charge distribution and transport in polymers

Sessler¹

1997

IEEE Trans. Dielect. Electr. Insul.

122

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Experimental work on charge distributions and charge transport in polymer films is reviewed. For studying the charge distributions in the thickness dimension, thermal or acoustic techniques are used with resolutions down to N 1 pm. The polymer samples usually are charged with corona, electron beam or thermal methods. Observation of the change of charge and polarization distributions with time allows one to draw conclusions about charge transport and charge injection phenomena. In some cases theoretical models have been established, based on excess-charge drift due to a finite carrier mobility and on charge compensation due to intrinsic or radiation-induced conductivity Other models are concerned with the interaction of injected or intrinsic space charge with a dipole polarization. Comparisons of measured and calculated charge distributions and their change with time show the applicability of these models and shed new light on charge trapping and charge transport phenomena.

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Thermal pulse measurements on electron-beam irradiated fluoroethylene-propylene copolymer

Cited by 4 publications

References 6 publications

A comparison of space-charge distributions in electron-beam irradiated FEP obtained by using heat-wave and pressure-pulse techniques

A comparison of space-charge distributions in electron-beam irradiated FEP obtained by using heat-wave and pressure-pulse techniques

Negative corona charge stability in plasma treated polytetrafluoroethylene teflon films

Charge distribution and transport in polymers

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