Encapsulation process for electronic devices using injection molding method

1993 ◽  
Vol 12 (1) ◽  
pp. 61-71 ◽  
Author(s):  
Tadamoto Sakai
Keyword(s):  
Injection Molding ◽  
Electronic Devices ◽  
Molding Method ◽  
Encapsulation Process

Fabrication of a Nanosize Pattern Embedded Plastic Chip via an Injection Molding Method for Application to an Optical Biosensor

2010 ◽  
Vol 25 (5) ◽  
pp. 341-345
Author(s):  
K. H. Kim ◽  
W. Kim ◽  
J. C. Hong ◽  
H. S. Ko ◽  
B. K. Kim ◽  
...  
Keyword(s):  
Injection Molding ◽  
Optical Biosensor ◽  
Molding Method

scholarly journals 3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 980
Author(s):  
Xinfeng Wu ◽  
Yuan Gao ◽  
Tao Jiang ◽  
Lingyu Zheng ◽  
Ying Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electronic Devices ◽  
Epoxy Composites ◽  
Operating Efficiency ◽  
Impregnation Method ◽  
Molding Method ◽  
Needle Punching ◽  
3D Network ◽  
Network Method ◽  
Process Method

The heat generated by a high-power device will seriously affect the operating efficiency and service life of electronic devices, which greatly limits the development of the microelectronic industry. Carbon fiber (CF) materials with excellent thermal conductivity have been favored by scientific researchers. In this paper, CF/carbon felt (CF/C felt) was fabricated by CF and phenolic resin using the “airflow network method”, “needle-punching method” and “graphitization process method”. Then, the CF/C/Epoxy composites (CF/C/EP) were prepared by the CF/C felt and epoxy resin using the “liquid phase impregnation method” and “compression molding method”. The results show that the CF/C felt has a 3D network structure, which is very conducive to improving the thermal conductivity of the CF/C/EP composite. The thermal conductivity of the CF/C/EP composite reaches 3.39 W/mK with 31.2 wt% CF/C, which is about 17 times of that of pure epoxy.

Development of ultraprecise injection molding method for thermoplasticlenses

1992 ◽  
Author(s):  
Akiro Fukushima ◽  
Motoaki Kawazu ◽  
Hidenori Ito ◽  
Hisaaki Koseko ◽  
Toshiharu Hatakeyama ◽  
...  
Keyword(s):  
Injection Molding ◽  
Molding Method

Influence of the processing method on the heat resistance of the secondary block copolymer of propylene and ethylene filled with rice hulls

2021 ◽  
Vol 11 ◽  
pp. 32-38
Author(s):  
A. R. Sadritdinov ◽  
◽  
E. M. Zakharova ◽  
A. A. Psyanchin ◽  
A. G. Khusnullin ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Injection Molding ◽  
Heat Resistance ◽  
Polymer Composites ◽  
Softening Temperature ◽  
Mechanical Action ◽  
Decomposition Temperature ◽  
Inert Atmosphere ◽  
Rice Hulls ◽  
Molding Method

Polymer composites based on secondary thermoplastic polymers filled with biodegradable components of plant origin was developed. Repeated thermal and mechanical action on polymers during their processing in the presence of dispersed phase particles leads to a change in the thermophysical and strength characteristics of finished products. The paper studies the regularities of changes in the heat resistance of polymer composites based on a secondary block copolymer of propylene and ethylene, and rice husks, processed by injection molding and pressing. It is shown that filling the secondary polymer with rice hulls leads to an increase in the heat resistance of composites, which is characterized by an increase in the bending temperature under load, Vicat softening temperature, and decomposition temperature during thermogravimetric analysis in an inert atmosphere. Compared to the injection molding method, the processing of polymer composites by pressing makes it possible to obtain more heat-resistant plastic products. Obviously, this is due to the different degrees of crystallinity of the polymer phase. The high cooling rate of the polymer composite melt during the filling of the injection mold reduces the time required for the corresponding change in the conformation of macromolecules and the formation of the crystalline phase. As a consequence, an increase in the content of the amorphous phase of the secondary block copolymer of propylene and ethylene decreases the heat resistance of the prototypes.

Effects of molding on property of thermally conductive and electrically insulating polyamide 6–based composite

2018 ◽  
Vol 32 (9) ◽  
pp. 1190-1203 ◽  
Author(s):  
Xuping Yang ◽  
Wenbin Yang ◽  
Jinghui Fan ◽  
Juying Wu ◽  
Kai Zhang
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Injection Molding ◽  
Annealing Time ◽  
Polyamide 6 ◽  
Molding Pressure ◽  
Hot Press ◽  
Molding Method ◽  
Thermally Conductive ◽  
Press Molding

Thermally conductive and electrically insulating polyamide 6 (PA6) matrix quaternary composites were prepared by hot press molding and injection molding, respectively. The quaternary composites were composed of zero-dimensional aluminum oxide particle, one-dimensional silicon carbide whisker, two-dimensional flake graphite, and PA6 resin matrix. Morphology, structure, density, thermal conductivity, volume electrical resistivity, and tensile strength of two types of composites were characterized by scanning electron microscopy, X-ray diffractometer, thermal conductivity tester, high resistance micro-current tester, and tensile tester. The results showed that crystallinity, thermal conductivity, density, and tensile strength of hot press molding samples were superior to those of samples made by injection molding method. This is due to that hot press molding method can provide higher molding pressure and longer annealing time than injection molding. The mechanism could be explained that the performances of the composites were promoted by increasing molding pressure and annealing time.

scholarly journals Development of Levitation Coil by Reaction Injection Molding Method.

2000 ◽  
Vol 41 (2) ◽  
pp. 57-62
Author(s):  
Masao SUZUKI ◽  
Tsuyoshi FUJIMOTO ◽  
Hiroshi SUWA
Keyword(s):  
Injection Molding ◽  
Molding Method ◽  
Reaction Injection Molding ◽  
Levitation Coil

Research on the Flow Characteristics of Polymer Injection Molding under Ultrasonic Vibration and Plastics’ Mechanical Strength

2010 ◽  
Vol 37-38 ◽  
pp. 1092-1100
Author(s):  
Ji Bin Li ◽  
Ke Ke Xu ◽  
Xin Bo Lin ◽  
Xiao Yu Wu ◽  
Guo Li Gao
Keyword(s):  
Mechanical Properties ◽  
Injection Molding ◽  
Ultrasonic Vibration ◽  
Flow Characteristics ◽  
Mechanical Tests ◽  
Impact Testing ◽  
Melt Flow Rate ◽  
Polymer Injection ◽  
Molding Method ◽  
The Impact

In this paper, ultrasonic vibration is adopted and exerted on injection molding in order to improve plastics’ forming ability, and the impact testing is used to analyze different injection parts’ mechanical properties. On the one hand, experiments prove that ultrasonic vibration can increase polymer’s melt flow rate, decrease melt viscosity, and improve injection flowing in mould cavity. On the other hand, the mechanical tests prove that the ultrasonic vibration can improve plastics’ tensile strength, elastic modulus and other mechanical properties. As a result, a weldless ultrasound-assisted injection molding method is recommended.

Research on Rubber One Step Injection Molding Technology and Equipment

2012 ◽  
Vol 501 ◽  
pp. 344-348
Author(s):  
Yi Zhou Pei ◽  
Bai Yuan Lv
Keyword(s):  
Injection Molding ◽  
High Efficiency ◽  
Low Cost ◽  
New Technology ◽  
Laboratory Research ◽  
Molding Method ◽  
Good Product ◽  
One Step ◽  
The One ◽  
Good Product Quality

Through the laboratory research on the one step injection molding technology, as well as a series of industrialization researches on the injection tire capsule, injection oilfield used screw drill rubber stator and injection solid tire, this thesis presents the principle of one step injection molding technology and proves the feasibility, practicability of this technology. Substituting the traditional compression molding method, one step injection molding is a new technology with high efficiency, good product quality and low cost; it also has a broad prospect of application and huge developing potential.

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