Laser Assisted Seeding for Electroless Plating on Insulators

1992 ◽  
Vol 285 ◽  
Author(s):  
A.G. Schrott ◽  
B. Braren ◽  
E.J.M. O'sullivan ◽  
R.F. Saraf
Keyword(s):  
Band Gap ◽  
Excimer Laser ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Repetition Rate ◽  
Laser Light ◽  
Laser Pulses ◽  
Electron Excitation ◽  
Insulating Materials

ABSTRACTExcimer laser pulses with wavelengths of 248 and 308 nm were used to selectively seed Pd on SiO2 surfaces, making them suitable for electroless plating. This novel seeding process for insulating materials is accomplished with the sample immersed in the seeding solution, and occurs only on the areas of the substrate that are illuminated (through the liquid) by the laser light. The Pd content of the seeded samples increased with the number of pulses, but was rather independent of repetition rate. The deposition rate showed a dependence with wavelength consistent with a defect driven mechanism for electron excitation through the band gap of SiO2. These electrons then reduce the Pd ions in the solution in contact with the surface.

Uv Excimer Laser Induced Prenucleation of Surfaces from Spin-on Films Followed by Electroless Metallization

1988 ◽  
Vol 131 ◽  
Author(s):  
Hilmar Esrom ◽  
Georg Wahl ◽  
Michael Stuke
Keyword(s):  
Excimer Laser ◽  
Electroless Plating ◽  
Laser Light ◽  
Palladium Acetate ◽  
Curved Surfaces ◽  
Surface Material ◽  
Contact Metallization ◽  
Electroless Metallization ◽  
Via Holes

ABSTRACTUV excimer laser light-induced prenucleation of various surfaces from spin-on films in air is described. Good results were obtained using palladium acetate on substrate materials ranging from ceramics to polymers and even paper. Virtually any surface material can be prenucleated in this way. The Pd-prenucleated planar and curved surfaces can be metallized by a vast variety of metals using electroless plating solutions (Cu, Ni, Au, Pt, Co, Sn, and even alloys). Results are described in detail for copper from a standard electroless solution (Doduco or Shipley). Contact metallization through via holes using this process was aachieved with excellent contact properties.

scholarly journals Excimer Laser Surface Modification: Process and Properties

1992 ◽  
Vol 279 ◽  
Author(s):  
T. R. Jervis ◽  
M. Nastasi ◽  
J.-P. Hirvonen
Keyword(s):  
Surface Modification ◽  
Rapid Solidification ◽  
Excimer Laser ◽  
Amorphous Materials ◽  
Laser Light ◽  
Heat Treating ◽  
Laser Pulses ◽  
Ceramic Materials ◽  
Surface Zone ◽  
Molten Layer

ABSTRACTSurface modification can improve materials for structural, tribological, and corrosion applications. Excimer laser light has been shown to provide a rapid means of modifying surfaces through heat treating, surface zone refining, and mixing. Laser pulses at modest power levels can easily melt the surfaces of many materials. Mixing within the molten layer or with the gas ambient may occur, if thermodynamically allowed, followed by rapid solidification. The high temperatures allow the system to overcome kinetic barriers found in some ion mixing experiments. Alternatively, surface zone refinement may result from repeated melting-solidification cycles.Ultraviolet laser light couples energy efficiently to the surface of metallic and ceramic materials. The nature of the modification that follows depends on the properties of the surface and substrate materials. Alloying from both gas and pre-deposited layer sources has been observed in metals, semiconductors, and ceramics. Surface enrichment of Cr by zone refinement of stainless steel has also been seen. Rapid solidification after melting often results in the formation of non-equilibrium phases, including amorphous materials. Improved surface properties, including tribology and corrosion resistance, are observed in these materials.

Effects of laser repetition rate on corneal tissue ablation for 193-nm excimer laser light

2008 ◽  
Vol 40 (7) ◽  
pp. 483-493 ◽  
Author(s):  
Leia M. Shanyfelt ◽  
Pamela L. Dickrell ◽  
Henry F. Edelhauser ◽  
David W. Hahn
Keyword(s):  
Excimer Laser ◽  
Repetition Rate ◽  
Laser Light ◽  
Tissue Ablation ◽  
Corneal Tissue ◽  
Laser Repetition Rate ◽  
193 Nm

Shortening of excimer laser pulses with saturable absorbers

1984 ◽  
Vol 52 (3) ◽  
pp. 211-214 ◽  
Author(s):  
Ch.G. Christov ◽  
I.V. Tomov ◽  
I.V. Chaltakov ◽  
V.L. Lyutskanov
Keyword(s):  
Excimer Laser ◽  
Laser Pulses ◽  
Saturable Absorbers

Optical breakdown and filamentation of femtosecond laser pulses propagating in air at a kHz repetition rate

2004 ◽  
Vol 13 (3) ◽  
pp. 359-363 ◽  
Author(s):  
Duan Zuo-Liang ◽  
Chen Jian-Ping ◽  
Li Ru-Xin ◽  
Lin Li-Huang ◽  
Xu Zhi-Zhan
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses
Sign in / Sign up

Export Citation Format

Share Document