Vacuum deposited polyimide thin films

Spassova, E.

doi:10.1016/s0042-207x(02)00783-2

Cited by 26 publications

(19 citation statements)

References 12 publications

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“…The characteristic IR absorption peaks were assigned thanks to previous works [17,[26][27][28][29][30][31][32][33][34][35][36]. Usually, PAA spectra are compound of the N-H stretch bonds at 2900-3200 cm -1 , the C=O carbonyl stretch from carboxylic acid at 1710-1720 cm -1 , the symmetric carboxylate stretch bonds at 1330-1415 cm -1 , the C=O carbonyl stretch of the amide I mode around 1665 cm -1 , the 1540-1565 cm -1 amide II mode and the 1240-1270 cm -1 band due to the C-O-C ether aromatic stretch (if present in the monomer).…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

BPDA-PDA Polyimide: Synthesis, Characterizations, Aging and Semiconductor Device Passivation

Diaham¹,

Locatelli²,

Khazaka³

2012

High Performance Polymers - Polyimides Based - From Chemistry to Applications

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Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

BPDA-PDA Polyimide: Synthesis, Characterizations, Aging and Semiconductor Device Passivation

Diaham¹,

Locatelli²,

Khazaka³

2012

High Performance Polymers - Polyimides Based - From Chemistry to Applications

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“…The deposition in vacuum and the polycondensation between the precursors of the PI matrix a reaction taking place in a solid state represents an attractive method for the formation of thin polymer layers. Polyimides have the capacity of implementing nanocomposite matrix both due to the possibility to be deposited in vacuum and their chemical inactivity, high thermal stability and appropriate optical and dielectric properties (Strunskus,Y and Grunze,M, 1994;E. Spassova, 2003;Iijima M and Takahashi Y, 1986).…”

Section: Vapour Deposition Of Thin Polymer Filmsmentioning

confidence: 99%

“…As a consequence of these reactions leading to a release of water and imidization also a certain pack of the layer is achieved. Some more substantial advantages of the vacuum deposition are as follows: (i) as compared with the "wet methods" the possibility for side reactions to take place is minimum (Strunskus,Y and Grunze,M, 1994;E. Spassova, 2003;Salem J et al, 1986); (ii) an even surface morphology and thickness in the interval between nanometers and microns are much easier to achieve without the presence of any rough defects; (iii) a possibility for a precise control of the multitude of the process parameters: degree of evacuation, mode of evaporation (thermal, electron beam, magnetron, etc.)…”

Section: Vapour Deposition Of Thin Polymer Filmsmentioning

confidence: 99%

Preparation of Polyimide Thin Films by Vapour Deposition and Solid State Reactions

Georgiev¹,

Spassova²,

Assa³

et al. 2010

Polymer Thin Films

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In this chapter we describe the preparation of polyimide thin films by physical vapour deposition and comment on their potential application as a pure material or a thin layer matrix for producing nanocomposite layers. Their superb properties, such as a low dielectric constant, high thermal-and photo-stability, high chemical resistance and high optical transmittance predetermine their wide-spread applications as a casts and layers used as insulators, protective or capsulation layers, mechanical or diffusion barriers, in opto-and microelectronics. The bulk properties of the polyimide allowed the preparation of nanocomposite materials with organic chromophores as a "guest" (the embedded in the matrix nanosized particles). Moreover, some of the "guest" could bind to the polyimide chain. There are numbers of aromatic polyimides which are broadly used as thin layers in nanotechnology. Vapour deposition of the precursors and solid state reactions of imidization are of a greater priority than the spin coating and dipping methods. These as-deposited films by the vacuum deposition process consist of a dianhydride and diamine mixture, which by solid state reactions is converted to polyimide by thermal treatments or by combined microwave and thermal treatments. The physical vapour deposition as a "dry" method provides high purity for producing thin polymer films of controlled thickness, ratio of precursors and composition control of the so prepared layers. In this chapter we suggest possibilities for the practical application of vapour deposition of precursors and the following solid state reactions. By the used spectral method-Fourier Transform Infrared Spectroscopy for analysis of the investigated kinetics of imidization reactions and microstructure of the layers are studied. The relationship between vapour deposition conditions and the presence of regular chains leading to the appearance of infrared bands is discussed. Polymers are also capable of forming a range of conformations depending on the backbone structure. The conditions for preparation by physical vapour deposition and solid state reaction of polyimide or nanocomposite polyimide layers are discussed.

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“…Our studies have focused primarily on vapour deposition of precursors and solid state imidization reaction [7,10,11,12]. Vapour deposition processes of organic layers play an important role in polytronics.…”

Section: Vapour Deposition and Solid State Reactionmentioning

confidence: 99%

“…These processes are to great extent accelerated and controlled in the thermal treatment of the condensed solid phase which represents PAA, with regard to their transformation to PI by means of reaction of polycyclodehydration in solid state to linear PI [7,10,11]. The FTIR spectra of individual films of PMDA, ODA and PAA are shown in figure 2.…”

Section: Vapour Deposition and Solid State Reactionmentioning

confidence: 99%

Chemical and Physical Properties of Polyimides: Biomedical and Engineering Applications

Georgiev¹,

Dimov²,

Spassova³

et al. 2012

High Performance Polymers - Polyimides Based - From Chemistry to Applications

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Vacuum deposited polyimide thin films

Cited by 26 publications

References 12 publications

BPDA-PDA Polyimide: Synthesis, Characterizations, Aging and Semiconductor Device Passivation

BPDA-PDA Polyimide: Synthesis, Characterizations, Aging and Semiconductor Device Passivation

Preparation of Polyimide Thin Films by Vapour Deposition and Solid State Reactions

Chemical and Physical Properties of Polyimides: Biomedical and Engineering Applications

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