SOLARC® Anti-Reflective Coating Material for High Transfer Efficiency Application Process

2012 ◽  
Vol 1447 ◽  
Author(s):  
Desaraju Varaprasad ◽  
Sudip Mukhopadhyay ◽  
Boris Korolev ◽  
Amanuel Gebrebrhan ◽  
Ya Qun Liu ◽  
...  
Keyword(s):  
Physical Vapor Deposition ◽  
High Speed ◽  
Flat Glass ◽  
Capital Requirements ◽  
Transfer Efficiency ◽  
Contact Printing ◽  
Roll Coating ◽  
Reflective Coating ◽  
Glass Substrates ◽  
Reflective Coatings

ABSTRACTIt has been demonstrated in literature that chemical liquid deposition (CLD) processes such as dip coating, spray coating, roll coating, spin coating, curtain coating, meniscus coating etc. can be successfully used to deposit anti-reflective coatings on glass substrates. In comparison to physical vapor deposition (PVD), a CLD process generally is cost efficient because of lower capital requirements to set up coating manufacturing lines. Within the realm of CLD processes only some application techniques are suitable for high speed continuous manufacturing processes to deposit coatings on large area glass substrates. Significant differences in transfer efficiencies of these high speed application processes are readily apparent when material utilization per unit area of glass are compared. Roll coat process among all the high speed CLD processes stands out for its high material transfer efficiency due to direct contact printing on flat glass substrates. Honeywell Electronic Materials expanded its line of SOLARC® anti-reflective coating materials to include a new coating formulation SOLARC® RPV, which is customized for roll coating application. This paper highlights the advantages of using SOLARC® RPV in roll coat process and the performance attributes of SOLARC® anti-reflective coatings. Durability characteristics of these anti-reflective coatings in accelerated aging tests designed to simulate harsh field conditions will also be discussed.

A Glass Dielectric Paste for Preparation Transparent Spacers of Vacuum Glass by Screen Printing

2012 ◽  
Vol 519 ◽  
pp. 252-255
Author(s):  
Jun Yan Zhao ◽  
Shi Yong Luo ◽  
Xin Lin Zhang ◽  
Wen Cai Xu ◽  
Man Zhao
Keyword(s):  
Network Structure ◽  
Vickers Hardness ◽  
Ethyl Cellulose ◽  
Screen Printing ◽  
Glass Powder ◽  
Flat Glass ◽  
Sound Insulation ◽  
Cellulose Solution ◽  
Glass Substrates ◽  
Melting Glass

Vacuum glass is a new building material with excellent energy conservation and sound insulation properties. Usually, the spacers between two pieces of flat glass substrates are mini-rings of metal. In the present research, the spacers were prepared with a glass dielectric paste by screen printing, and then sintered till them transparent. The glass dielectric paste for the preparation of transparent spacers of vacuum glass was prepared by using low melting glass powder and terpineol ethyl cellulose solution. The composition of the paste with preferable properties was evaluated as in mass percent: organic vehicle 20-25, and low melting glass powder 73-80. The rheological behaviors of the typical paste were characterized by using an ARES (RFS-III) rheometer. It is found that a weak flocculated network structure is formed in the paste for the high solid filler. The spacers were prepared by screen printing the paste on the glass substrate and then sintered. The transparent, Vickers hardness of the spacers as well as the binder forces between the spacers and the substrate is reported. The reliability of the prepared transparent spacers for the vacuum glass was discussed.

Microstructural Study of Thin Films CuFe Obtained by Thermal Evaporation of Nanostructured Milled Powder

2017 ◽  
Vol 47 ◽  
pp. 71-78
Author(s):  
H. Mechri ◽  
Ahmed Haddad ◽  
M. Zergoug ◽  
Mohammed Azzaz
Keyword(s):  
Thin Films ◽  
Solid Solution ◽  
Physical Vapor Deposition ◽  
Thermal Evaporation ◽  
Supersaturated Solid Solution ◽  
Milled Powder ◽  
Mechanically Alloyed ◽  
Glass Substrates ◽  
Milling Duration ◽  
Tungsten Boat

Commercial copper and iron powders were used as starting materials. These powders were mechanically alloyed to obtain Cu(100-x) Fex supersaturated mixture. The milling duration was chosen in such a way as to obtain a nanostructured mixture and to form a supersaturated solid solution of CuFe; the powder mixture was used to deposit CuFe on a glass substrate. The elaboration of our films has been carried out using thermal evaporation process (physical vapor deposition) under 1 × 10-6 mbar vacuum from an electrically heated tungsten boat, using the supersaturated solid solution Cu(100-x) Fex powder obtained by mechanical alloying. The films deposition has been done on glass substrates. In this study, we present the composition effect on the structural and magnetic proprieties of Cu(100-x) Fex powder and thin films. The chemical composition, structural and magnetic proprieties of milled powders and thin films were examined by SEM, TEM, XRD, XRF and VSM.

Silver Metal Pattern Fabrication on a Glass Substrate Using a Conformal Contact Printing

2013 ◽  
Vol 646 ◽  
pp. 106-110
Author(s):  
Da Hyeok Lee ◽  
Se Geun Park ◽  
Myoung Soo Kim ◽  
Young Hwan Cha ◽  
Beom Hoan O ◽  
...  
Keyword(s):  
Glass Substrate ◽  
Metal Films ◽  
Contact Method ◽  
Mold Surface ◽  
Contact Printing ◽  
Factors Affecting ◽  
Glass Substrates ◽  
Metal Pattern ◽  
Transfer Method ◽  
Conformal Contact

This paper describes a simple metal pattern transfer method on glass substrates. Ag metal films were transferred by the conformal contact method at 150°C, which did not require higher pressure than the conventional nano-imprinting method. The important factors affecting quality of transferred metal patterns on glass were the usage of anti-sticking layer on mold surface, thickness of transferred metal films and temperature during contact printing step. Various Ag patterns were transferred onto glass substrate.

A metal oxide adhesion layer prepared with water based coating solution for wet Cu metallization of glass interposer

2015 ◽  
Vol 2015 (1) ◽  
pp. 000365-000369 ◽  
Author(s):  
Zhiming Liu ◽  
Sara Hunegnaw ◽  
Hailuo Fu ◽  
Jun Wang ◽  
Tafadzwa Magaya ◽  
...  
Keyword(s):  
Metal Oxide ◽  
High Frequency ◽  
Metal Layer ◽  
Flat Glass ◽  
Adhesive Layer ◽  
Adhesion Layer ◽  
Coating Solution ◽  
Glass Substrates ◽  
Oxide Precursor ◽  
Oxide Adhesion

Inorganic interposers made of glass are attractive for advanced high frequency applications and ultra- fine line patterning technology. Because glass combines a couple of benefits like large form factor, good coefficient of thermal expansion (CTE) matching to silicon, smooth surface and a low dielectric constant and loss tangent. Recently much progress has been made with respect to glass electrical and physical properties. This allows for handling of thin glass sheets down to 100 μm in a typical PCB panel format. Also advances have been made in the area of laser drilling allowing aspect ratio up to 1:10 for 25 μm diameter of through glass via (TGV). Another major challenge is the cost competitive and reliable metallization of smooth glass, a critical prerequisite for the use of glass substrates in the electronic packaging market. Plated copper does not adhere directly to glass. Sputtering technology typically also requires a 50 nm thick adhesion promoting metal layer (like Ti) before copper can be seeded. This metal layer could not be etched together with the copper and needs to be removed between traces by etching in an additional step. A volatile flammable solvent based metal oxide precursor coating solution has been used to make an adhesive metal oxide layer by a modified sol-gel process. To prevent potential safety issue for mass production water based metal oxide precursor coating solution so called VitroCoat GI W has been developed. The VitroCoat GI W solution can be dip-coated on flat glass surface and TGVs followed by sintering to form an ultrathin metal oxide adhesion layer (about 10nm). The thin adhesive layer enables electroless and electrolytic copper plating directly onto glass substrates without changing any of the glass properties or impacting high frequency performance. The thin metal oxide adhesive layer is non-conductive and can be easily removed from the area between circuit traces. This paper will focus on the coating uniformity and capability of VitroCoat GI W on flat glass surface and TGVs and the adhesion of wet chemical metallization on glass interposer. This adhesion layer can be used for copper fine line patterning on glass and radio frequency (RF) device fabrication.

scholarly journals Threading Performance of Different Coatings for High Speed Steel Tapping

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 464
Author(s):  
Alain Gil Del Val ◽  
Fernando Veiga ◽  
Octavio Pereira ◽  
Luis Norberto Lopez De Lacalle
Keyword(s):  
Tool Life ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
High Speed ◽  
Cutting Speed ◽  
High Speed Steel ◽  
Tialn Coating ◽  
Tool Performance ◽  
Thread Profile ◽  
Increase Tool Life

Threading holes using tapping tools is a widely used machining operation in the industry. This manufacturing process involves a great tool immersion in the part, which involves both friction and cutting. This makes the use of coatings critical to improving tool life. Four coatings are used based on Physical vapor deposition (PVD) technology—TiN, TiCN, TiAlN and TiAlN+WC/C are compared to uncoated tool performance. The effect of various coatings on the life of M12 × 1.5 tapping tools during threading of through holes 20 mm deep, in GG25 casting plates, dry and applying cutting speed of 50 m/min. The end-of-life criterion has been established based on a cutting torque of 16 N-m. Taking the uncoated tap as a basis for comparison, it is observed that coatings based on PVD technologies increase tool life doubling in the most advantageous case with the TiAlN coating. PVD type coatings provide better protection to wear at cylindrical area of the tool, where the thread profile is finished, than uncoated taps. The teeth located in the cone-cylinder transition zone of the taps suffer the most wear regardless of the coating. However, taps coated with TiAlN+WC/C wear level values is lowest of all the coatings tested, which indicates a strong reinforcement in these teeth.

Rapid Synthesis of Nanostructural Intermetallics and their Bulk Properties

1996 ◽  
Vol 457 ◽  
Author(s):  
S. M. Pickard ◽  
A. K. Ghosh
Keyword(s):  
Grain Size ◽  
Physical Vapor Deposition ◽  
High Speed ◽  
Single Phase ◽  
Deposition Process ◽  
Indentation Hardness ◽  
Rotational Rate ◽  
Fine Grain ◽  
Compositional Variability ◽  
Nano Grains

ABSTRACTA rapid physical vapor deposition process (PVD) utilizing a high speed rotating substrate and small substrate-to-source spacing has been used to produce bulk sheet of Ti-Al alloys in the compositional range Ti-12% Al to Ti-75% Al1 at a rate of 1–3 μm/minute. Microstructural architectures produced by the method comprise of either fully homogenous phase mixtures of nano-grains, or nanolaminated material, depending on the substrate rotational rate, with lower rotational rate producing a layered microstructure. Defect populations within the as-deposited material are characterized by TEM and SEM, and hot pressing consolidation of the as-deposited material, which retains a grain size < 1000 nm, has been investigated. While indentation hardness of α2+γ(2 phase) alloys exceeded 7 GPa, brittle failure occurred in the elastic regime at nominally lower tensile stress than that for conventionally produced alloys containing Nb and Cr as solute elements. α2+γ alloys can exhibit tensile elongations of more than 100% at 850°C with retention of fine grain size. Elevated temperature failure occurs by the formation of voids in regions of compositional variability in the composite where single phase α2-Ti3Al structure was present.

Observations of Liquid Droplet Behavior and Oil Film Formation in O/W Type Emulsion Lubrication

1988 ◽  
Vol 110 (2) ◽  
pp. 348-353 ◽  
Author(s):  
T. Nakahara ◽  
T. Makino ◽  
K. Kyogoku
Keyword(s):  
High Speed ◽  
Liquid Droplet ◽  
Film Formation ◽  
Flat Glass ◽  
Glass Plate ◽  
Rolling Speed ◽  
Liquid Droplets ◽  
Speed Range ◽  
Oil Concentration ◽  
Inlet Zone

The behavior of liquid droplets in O/W type emulsions flowing between a flat glass plate and a metal roller was observed by means of a microscope. The behavior of the droplets introduced into the EHL film was found to be related to the streamlines of the continuous water phase in the vicinity of the inlet zone. It was observed that the oil droplets which penetrated into the EHL zone formed an oily pool (an oily film zone) containing water droplets in the inlet zone close to the EHL zone. This oily pool was a W/O emulsion rich in oil caused by phase inversion. The effects of oil concentration, emulsifier content and rolling speed on the area of the oily pool were investigated, and it was found that the extent of the oily pool was influenced by the rolling speed as well as oil concentration. The EHD film thickness was measured by means of optical interferometry with use of two wavelengths, and the measured results were compared with the calculated ones employing the starvation theory of Wolveridge et al. and the empirical equation of Wymer and Cameron for the region of the oil pool. It was found that course droplets play an important role in film formation by causing the formation of the oily pool in the low speed range. In the high speed range, however, a fine O/W emulsion forms the film.

Modeling and Analysis of Organic Light Emitting Diode with Thin Film Anti-Reflective Coatings

2020 ◽  
Vol 15 (4) ◽  
pp. 425-431
Author(s):  
B. M. Chaya ◽  
Prasant Kumar Pattnaik ◽  
K. Narayan
Keyword(s):  
Power Efficiency ◽  
Light Emitting Diode ◽  
Fdtd Method ◽  
Light Output ◽  
Single Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Reflective Coating ◽  
Organic Light ◽  
Reflective Coatings

The effects of anti-reflective coatings (ARC) on organic light emitting diode (OLED) optical characteristics are reported in this paper. The light output produced from the OLED is not 100%. But the emitted light is trapped due to various Modes. The losses at the glass air substrate interfaces of an OLED are addressed in this work. The Anti-Reflective coatings increase the light output by reducing OLED reflections at the interface between glass and air. The Finite Difference Time Domain (FDTD) method and the Fresnel theory have been used to design the device and study the effects on OLED of the Single Layer Anti-Reflective Coating (SLAR) and Double Layer Anti-Reflective Coating (DLAR). The thicknesses and refractive indices of the layers of the anti-reflective coatings were optimized. We also compared the light out coupling power efficiency of the SLAR coated OLED with that of an OLED with a DLAR coating and also with Conventional OLED. The results show that the enhancement in light output efficiency of the DLAR coated OLED was slightly higher than that of the SLAR coated OLED.

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