Optimization of ohmic contact on n-type GaAs by screen-printing silver paste

2020 ◽  
Vol 59 (8) ◽  
pp. 081005
Author(s):  
Qiangjian Sun ◽  
Junhua Long ◽  
Pan Dai ◽  
Xinping Huang ◽  
Shuhong Nie ◽  
...  
Keyword(s):  
Ohmic Contact ◽  
Screen Printing ◽  
Silver Paste

Electrical Properties of Silver Paste Prepared from Nanoparticles and Lead-Free Frit

2007 ◽  
Vol 7 (11) ◽  
pp. 3917-3919 ◽  
Author(s):  
Sung Hyun Park ◽  
Dong Seok Seo ◽  
Jong Kook Lee
Keyword(s):  
Silver Nanoparticles ◽  
Electrical Properties ◽  
Screen Printing ◽  
Chemical Reduction ◽  
Silver Powder ◽  
Average Particle Size ◽  
Average Particle ◽  
Chemical Reduction Method ◽  
Silver Paste ◽  
Thermal And Electrical Properties

Recently, PbO containing glass systems in commercial silver paste have been used due to their low glass transition temperature, good thermal and electrical properties. However, PbO is a hazardous material to both health and the environment. In this study, Pb-free silver paste was prepared by mixing commercial silver powder and silver nanoparticles. The commercial powder has an average particle size of 1.6 μm. The silver nanoparticles with particles size of 20–50 nm were synthesized by a chemical reduction method using surfactant. Pb-free frit was added into the mixed silver powder as the amounts of 3, 6 and 9 wt%. Using the obtained paste, thick films were fabricated by a screen printing on alumina substrate and the films were fired at temperature from 400 to 550 °C. The films had thickness of 6–11 μm and sheet resistivity of about 4–11 μΩ cm.

scholarly journals Enhanced Field Emission of Single-Wall Carbon Nanotube Cathode Prepared by Screen Printing with a Silver Paste Buffer Layer

Nanomaterials ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 165
Author(s):  
Ruirui Jiang ◽  
Jianlong Liu ◽  
Kaiqiang Yang ◽  
Jing Zhao ◽  
Baoqing Zeng
Keyword(s):  
Carbon Nanotube ◽  
Buffer Layer ◽  
Field Emission ◽  
Screen Printing ◽  
Emission Current ◽  
Operating Voltage ◽  
Single Wall Carbon Nanotube ◽  
Silver Paste ◽  
Single Wall Carbon ◽  
Screen Printed

A high emission current with relatively low operating voltage is critical for field emission cathodes in vacuum electronic devices (VEDs). This paper studied the field emission performance of single-wall carbon nanotube (SWCNT) cold cathodes prepared by screen printing with a silver paste buffer layer. The buffer layer can both enforce the adhesion between the SWCNTs and substrate, and decrease their contact resistance, so as to increase emission current. Compared with paste mixing CNTs and screen printed cathodes, the buffer layer can avoid excessive wrapping of CNTs in the silver slurry and increase effective emission area to reduce the operating voltage. The experimental results show that the turn-on field of the screen-printed SWCNT cathodes is 0.9 V/μm, which is lower than that of electrophoretic SWCNT cathodes at 2.0 V/μm. Meanwhile, the maximum emission current of the screen-printed SWCNT cathodes reaches 5.55 mA at DC mode and reaches 10.4 mA at pulse mode, which is an order magnitude higher than that of electrophoretic SWCNTs emitters. This study also shows the application insight of small or medium-power VEDs.

scholarly journals Stretchable Strain Sensors Fabricated by Screen Printing of Silver Paste on the Surface Modified Transparent Elastomeric Polyurethane Films

2018 ◽  
Vol 09 (13) ◽  
pp. 1008-1020 ◽  
Author(s):  
Chang Gyu Lee ◽  
Bo Seok Kwon ◽  
Hyun Min Nam ◽  
Duck Min Seo ◽  
Jinwoo Park ◽  
...  
Keyword(s):  
Screen Printing ◽  
Strain Sensors ◽  
Silver Paste ◽  
Surface Modified

Fabrication of Pb-Free Silver Paste and Thick Film Adding Silver Nanoparticles

2007 ◽  
Vol 124-126 ◽  
pp. 639-642 ◽  
Author(s):  
Sung Hyun Park ◽  
Dong Seok Seo ◽  
Jong Kook Lee
Keyword(s):  
Silver Nanoparticles ◽  
Screen Printing ◽  
Chemical Reduction ◽  
Silver Powder ◽  
Thick Films ◽  
Electronic Devices ◽  
Average Particle Size ◽  
Average Particle ◽  
Silver Paste ◽  
The Relationship

Fabrication of paste at low temperature has been developed in order to apply for various electronic devices, such as bus electrode and address electrode in PDP, especially for enlargement of a screen size. In this study, nano-sized silver particles with 10 - 30 nm were synthesized from silver nitrate (AgNO3) by a chemical reduction method. To prepare Pb-free silver paste, the silver nanoparticles were mixed with conventional silver powder with an average particle size of 1.6 and conventional Pb-free frit. Thick films were fabricated from silver paste by a screen printing on alumina substrate and the films were fried at temperatures ranging from 550 °C to 600 °C. Microstructures of the fried thick films were analyzed by FE-SEM. Sheet resistivity of fried thick films was measured and also the relationship between sinterability and conductivity of these films were investigated.

Initiatively embedding silver colloids in glass used in silver paste to improve metallization ohmic contact on silicon wafers

2020 ◽  
Vol 43 (1) ◽  
Author(s):  
Guoqing Li ◽  
Xinjie Sun ◽  
Hua Tong ◽  
Jiefeng Zhang ◽  
Hui Li ◽  
...  
Keyword(s):  
Ohmic Contact ◽  
Silicon Wafers ◽  
Silver Colloids ◽  
Silver Paste

Microstructure for Printed Multilayer LTCC Tape of Different Paste Rheology

2010 ◽  
Vol 654-656 ◽  
pp. 2378-2381 ◽  
Author(s):  
Sabrina Mohd Shapee ◽  
Rosidah Alias ◽  
Ibrahim Azmi ◽  
Zulkifli Ambak ◽  
Mohd Zulfadli Mohamed Yusoff ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Screen Printing ◽  
Critical Parameter ◽  
Test Pattern ◽  
High Viscosity ◽  
Print Quality ◽  
Pattern Design ◽  
Silver Paste ◽  
Ceramic Tape ◽  
Scanning Electron

Screen printing is the most common method of transferring silver thick film paste to a low temperature co-fired ceramic tape. Silver paste with varying rheology will have a varying print quality. The effect of silver paste rheology on the microstructure is investigated. Although there are many parameters to be considered, this parameter is a critical parameter which will control the line width and roughness on the substrate. To study the effect of paste rheology, a test pattern design was printed on the Heraeus CT2000 LTCC tape using silver paste. Then the LTCC tape was stacked and laminated at pressure of 28 MPa and temperature of 65 oC for 10 minutes. The laminated sample then was fired up to 850 oC. The fired silver conductor printed on the LTCC tape then was analyzed. Prints were evaluated by scanning electron microscopy. It was found that silver paste with high viscosity produce a good microstructure.

Sign in / Sign up

Export Citation Format

Share Document