Maskless Laser Patterning for Gold Plating of Microelectronic Materials

1983 ◽  
Vol 130 (9) ◽  
pp. 1840-1844 ◽  
Author(s):  
R. J. von Gutfeld ◽  
M. H. Gelchinski ◽  
L. T. Romankiw
Keyword(s):  
Gold Plating ◽  
Laser Patterning ◽  
Microelectronic Materials

Microstructural changes of Aluminum Nitride after laser irradiation and electroless copper deposition

1994 ◽  
Vol 52 ◽  
pp. 636-637
Author(s):  
S. Cao ◽  
A. J. Pedraza ◽  
L. F. Allard
Keyword(s):  
Aluminum Nitride ◽  
Laser Irradiation ◽  
Electroless Deposition ◽  
Thermal Evaporation ◽  
Surface Region ◽  
Near Surface ◽  
Laser Patterning ◽  
Electroless Copper ◽  
Excimer Laser Irradiation ◽  
Laser Effect

Excimer-laser irradiation strongly modifies the near-surface region of aluminum nitride (AIN) substrates. The surface acquires a distinctive metallic appearance and the electrical resistivity of the near-surface region drastically decreases after laser irradiation. These results indicate that Al forms at the surface as a result of the decomposition of the Al (which has been confirmed by XPS). A computer model that incorporates two opposing phenomena, decomposition of the AIN that leaves a metallic Al film on the surface, and thermal evaporation of the Al, demonstrated that saturation of film thickness and, hence, of electrical resistance is reached when the rate of Al evaporation equals the rate of AIN decomposition. In an electroless copper bath, Cu is only deposited in laser-irradiated areas. This laser effect has been designated laser activation for electroless deposition. Laser activation eliminates the need of seeding for nucleating the initial layer of electroless Cu. Thus, AIN metallization can be achieved by laser patterning followed by electroless deposition.

A Future Online Analyzer for Hidden Project Management Risks

2017 ◽  
Vol 7 (7) ◽  
pp. 99
Author(s):  
Rupali A. Mahajan
Keyword(s):  
Cloud Computing ◽  
Project Management ◽  
Qualitative Study ◽  
Software Testing ◽  
Gold Plating ◽  
Software Cost ◽  
Test Information ◽  
Online Software

The aim of this qualitative study was to investigate and comprehend the conditions that impact software cost, requirement tracking as well as scheduled software testing as an online administration and inspire essential exploration issues. Interviews were led with administrators from five associations. Thestudy utilized qualitative grounded hypothesis as its exploration system. The effects show that the interest for software testing and online requirement monitoring as an online administration is on the ascent and is impacted by conditions, for example, the level of area information required to adequately test a provision, adaptability and expense adequacy as profits, security and estimating as top prerequisites, cloud computing as the project monitor mode and the need for software analyzers to sharpen their abilities. Potential e x p l o r a t i o n territories recommended incorporate requisition regions best suited for online software testing, estimating and treatment of test information among others. The key issue is to monitor client’s requirements, track those requirements and also make it bug free and to avoid requirement gold plating issue. This study will present latest i d e a a b o u t online r e q u i r e m e n t monitoring and software testing.

Superhydrophobic microspiked surface structures by ultrashort laser patterning

2021 ◽  
pp. 1-11
Author(s):  
R. Jagdheesh ◽  
J. Kopeček ◽  
J. Brajer ◽  
T. Mocek
Keyword(s):  
Surface Structures ◽  
Laser Patterning ◽  
Ultrashort Laser

scholarly journals Recycling silver nanoparticle debris from laser ablation of silver nanowire in liquid media toward minimum material waste

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
June Sik Hwang ◽  
Jong-Eun Park ◽  
Gun Woo Kim ◽  
Hyeono Nam ◽  
Sangseok Yu ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Silver Nanoparticle ◽  
Building Materials ◽  
Raw Materials ◽  
Silver Nanowires ◽  
Silver Nanowire ◽  
Liquid Media ◽  
Ag Nps ◽  
Laser Patterning ◽  
Inexpensive Procedure

AbstractAs silver nanowires (Ag NWs) are usually manufactured by chemical synthesis, a patterning process is needed to use them as functional devices. Pulsed laser ablation is a promising Ag NW patterning process because it is a simple and inexpensive procedure. However, this process has a disadvantage in that target materials are wasted owing to the subtractive nature of the process involving the removal of unnecessary materials, and large quantities of raw materials are required. In this study, we report a minimum-waste laser patterning process utilizing silver nanoparticle (Ag NP) debris obtained through laser ablation of Ag NWs in liquid media. Since the generated Ag NPs can be used for several applications, wastage of Ag NWs, which is inevitable in conventional laser patterning processes, is dramatically reduced. In addition, electrophoretic deposition of the recycled Ag NPs onto non-ablated Ag NWs allows easy fabrication of junction-enhanced Ag NWs from the deposited Ag NPs. The unique advantage of this method lies in using recycled Ag NPs as building materials, eliminating the additional cost of junction welding Ag NWs. These fabricated Ag NW substrates could be utilized as transparent heaters and stretchable TCEs, thereby validating the effectiveness of the proposed process.

scholarly journals Defect-less, vertically aligned graphene sheets expanded fanwise on their horizontal structure by direct CO2-laser patterning

Carbon ◽  
2021 ◽  
Author(s):  
Seungyoung Park ◽  
Seul Gi Ji ◽  
Yeoheung Yoon ◽  
Seong K. Kim ◽  
Wooseok Song ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Graphene Sheets ◽  
Horizontal Structure ◽  
Laser Patterning ◽  
Vertically Aligned

Direct Laser Patterning of a 2D WSe 2 Logic Circuit

2021 ◽  
pp. 2009549
Author(s):  
Chao Zhu ◽  
Xiaoxu Zhao ◽  
Xiaowei Wang ◽  
Jieqiong Chen ◽  
Peng Yu ◽  
...  
Keyword(s):  
Logic Circuit ◽  
Laser Patterning ◽  
Direct Laser

scholarly journals Laser Patterning a Graphene Layer on a Ceramic Substrate for Sensor Applications

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2134 ◽  
Author(s):  
Marcin Lebioda ◽  
Ryszard Pawlak ◽  
Witold Szymański ◽  
Witold Kaczorowski ◽  
Agata Jeziorna
Keyword(s):  
High Speed ◽  
Graphene Layer ◽  
Ceramic Substrate ◽  
Direct Process ◽  
Laser Technology ◽  
Sensor Applications ◽  
Laser Patterning ◽  
Good Shape ◽  
Shape Mapping ◽  
Sensory Layer

This paper describes a method for patterning the graphene layer and gold electrodes on a ceramic substrate using a Nd:YAG nanosecond fiber laser. The technique enables the processing of both layers and trimming of the sensor parameters. The main aim was to develop a technique for the effective and efficient shaping of both the sensory layer and the metallic electrodes. The laser shaping method is characterized by high speed and very good shape mapping, regardless of the complexity of the processing. Importantly, the technique enables the simultaneous shaping of both the graphene layer and Au electrodes in a direct process that does not require a complex and expensive masking process, and without damaging the ceramic substrate. Our results confirmed the effectiveness of the developed laser technology for shaping a graphene layer and Au electrodes. The ceramic substrate can be used in the construction of various types of sensors operating in a wide temperature range, especially the cryogenic range.

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