Laser-Induced Selective Copper Deposition on Polyimides and Semiconductors

Hwang, Seong-Don; Kher, Shreyas S.; Spencer, James T.; Dowben, Peter A.

doi:10.1557/proc-282-185

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…Copper lines may readily be deposited onto polyimide [18] or only a palladium activation layer is laser deposited, followed by electrochemical deposition of copper [19]. Even the polyimide surface may be made conductive by laser light irradiation, after which the copper electrodeposition will be possible [20].…”

Section: Laser Direct Writingmentioning

confidence: 99%

Printed solenoid windings for miniature electromagnetic devices

Kruusing¹,

Leppävuori²,

Uusimäki³

1999

J. Micromech. Microeng.

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In order to facilitate the fabrication of miniature windings, it is proposed to print the conductor paths side by side on a tape which would be wound around the magnetic core.One-section winding must have a special form and needs connection of separate paths at its ends. These interconnections could be avoided in two-section symmetric magnetic circuits where printed winding with spiral conductor paths could be used.The use of printed solenoid windings is illustrated on the example of a 4 × 4 × 2.5 mm 3 transformer.

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Section: Laser Direct Writingmentioning

confidence: 99%

Printed solenoid windings for miniature electromagnetic devices

Kruusing¹,

Leppävuori²,

Uusimäki³

1999

J. Micromech. Microeng.

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Selective area laser-induced deposition of rare earth hexaborides from solution

1998

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Fabrication of chromium oxide nanoparticles by laser-induced deposition from solution

Zhong

Cheng

Bosley

et al. 2001

Applied Surface Science

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Metallic wires and dots can be obtained by reducing a metallic salt in the pores of a membrane. Electrodeposition processes in nanometer-sized pores of aluminum oxide membranes was reported more than 30 years ago [1]. Ultra-dense arrays (reaching 10 11 cm −2 ) of nanometer-size electrodeposited columns have been successfully produced on substrates made by electron lithography [2]. The use of plastic porous membranes has been extensively investigated and a variety of nano-materials have been successfully made by this method [3 and 4]. The reduction of metal ions in the membrane creates an assembly of wires, several micrometers in length, with a diameter chosen in the range 30 nm to a few micrometers [5, 6 and 7]. This is of great interest because magnetic systems of very small dimensions can reveal mesoscopic and quantum effects. Single electron blocking effects have been evidenced in oxidized STM tips or substrates [8], and similar effects were reported in nanowires smaller than 0.01 μm 2 [5]. Initial results on magnetoresistance measurements on nanometer diameter Ni/NiO/Co wires [6] provide evidence of an impurity in the tunnel barrier playing a role in Coulomb blockade [6 and 9], and indeed negative tunnel magnetoresistance might be observed when impurities are present in the barrier [6]. The extension of the Coulomb blockade effect to the ferromagnetic case is at its infancy, but initial measurements [10, 11 and 12] and theories [13 and 14] indicate that such systems can show enhanced magnetoresistive properties. An estimate for the spin-fl ip time τ SF , deduced from diffusive transport bulk values is of the order of 10 −12 s. A more relevant time scale for very small metallic particles can be found in the results of Ralph et al. [15 and 16] nanoparticles. They gave an estimate of 10 −8 -10 −9 s for the relaxation rate of excited states. Making nanoscale particle of ferromagnetic and antiferromagnetic particles is the key to future research in this area. Chromium oxides have attracted much attention recently because of their importance both in science and technology. Band-structure calculations [17] predict that CrO 2 is a half-metallic ferromagnet -a system which is metallic for one spin direction and insulating for the opposite spin direction. This contention is supported by refl ectivity measurements [18] and Andreev scattering [19 and 20]. Unfortunately, it is very diffi cult to fabricate CrO 2 nanoparticles by using conventional methods due to the high temperatures required and the metastablity of CrO 2 phase, nor there has been much success with the fabrication of nanoparticles in the antiferromagnetic insulating Cr 2 O 3 phase.Laser-assisted deposition from solution is clearly compatible with electrochemical deposition. The laser-assisted deposition from solution (LISD) techniques has been successfully used to deposit ReB 6 (Re=rareearthmetal) [21,22,23 [29]. Laser assisted deposition from a solution of silver nitrate was also used to deposit silver clusters [30]. In both the deposition of coppe...

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Laser-Induced Selective Copper Deposition on Polyimides and Semiconductors

Cited by 4 publications

References 19 publications

Printed solenoid windings for miniature electromagnetic devices

Printed solenoid windings for miniature electromagnetic devices

Selective area laser-induced deposition of rare earth hexaborides from solution

Fabrication of chromium oxide nanoparticles by laser-induced deposition from solution

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