Novel drilling technique in polyimide using visible laser

Abstract

A drill, fill, and plug technique for fabricating laser fusion targets

Comparison of the modeling and experimental data of the laser drilled microhole profiles in carbon fiber composites in low fluence regime

“…Most experimental works [2][3][4][5][6][7][8][9][10][11][12][13][14][15] confirm that the laser ablation for polymers and fiber reinforced composites obeys the simple Beer's law, there are several publications to establish simple models for the ablation rate with modified Beer's law [15,. Although occasionally there are conical [44], domelike [7,[45][46], trapezoidal or V [6] shaped holes reported, only Olson and Swope [14] calculated the Gaussian beam drilling hole profiles, however their model is restricted to only one pulse and can not explain the stabilized hole formation which is observed in this paper in the low fluence regime regarded as less than 10 J/cm 2 . In this paper, not only a new simple method to model drilling hole profiles is presented but also the reason of stabilized hole formation is explained for polymers and fiber reinforced composites under certain circumstances.…”

“…Since then, intense research activities have been carried out in this area [2][3][4][5][6] due to the many applications in electronic and other manufacturing processes. In the past, the processing materials are mainly polyimide (Dupont Kapton TM ) [6][7][8] (used in electronic packing industry), polymethylmethacrylate (PMMA) [9][10][11], polyethylene-terephthalate (PET) [12][13], ceramics (with organic polymer binding) [14], and polyphenylquinoxaline (PPQ) (a thermostable polymer used in microelectronics) [15]. Carbon fiber composites (CFCs) are also studied intensely because of their applications as acoustic damping panels in the aerospace industry [16][17].…”

Pulsed Laser Drilling of Engineering Plastic Films to Fabricate Through-Hole Membranes for Print-and-Imprint Method

“…Kumagai et al investigated laser ablation of polymer films of polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, and polyimide (PI) through multiphoton absorption using a femtosecond high-peak-power Ti:sapphire laser at 798 nm [15]. High-quality laser processing of engineering plastics of PI [16][17][18], poly(methyl methacrylate) [19][20][21], and a conducive polymer of poly (3,4-ethylenedioxythiophene) poly(styrene sulfonate) [22] has been demonstrated. However, practical applications of laser-processed engineering plastics are scarce up to date.…”

<title>Laser-drilled microhole profiles in fiber-reinforced composites</title>

“…Intense research activities have been carried out in this area [3][4][5][6][7][8] due to the many applications in electronic and manufacturing processes. At present, the processing materials are mainly polyimide (Dupont Kapton) [8][9][10], polymethylmethacrylate (PMMA) [1 1-13], polyethylene-terephthalate (PET) [14][15], ceramics [16], and polyphenylquinoxaline (PPQ) [17]. Carbon fibre composites (CFCs) are also studied intensely because of their applications as acoustic damping panels in the aerospace industry [18][19].…”

“…Most experimental works [4][5][6][7][8][9][10][11][12][13][14][15][16][17] confirm that the laser ablation for polymers and fibre reinforced composites obeys the simple Beer's law and there are several publications to establish simple models for the ablation rate with modified Beer's law [17,[20][21][22][23][24][25][26][27][28][29][30]. Although occasionally there are conical [31], domelike [7,[32][33], trapezoidal or V [8] shaped holes reported, only Olson and Swope [16] calculated the Gaussian beam drilling hole profiles, however their model is restricted to only one pulse and can not explain the stabilized hole formation in thelow fluence regime.…”