Dependence of Surface Microroughness of CZ, FZ, and EPI Wafers on Wet Chemical Processing

1992 ◽  
Vol 139 (8) ◽  
pp. 2133-2142 ◽  
Author(s):  
M. Miyashita ◽  
T. Tusga ◽  
K. Makihara ◽  
T. Ohmi
Keyword(s):  
Chemical Processing ◽  
Wet Chemical ◽  
Surface Microroughness

Thermodynamical Calculations and Experimental Confirmation about the Mg-Al-Spinel Reaction Path in the Sol-Gel-Process

2006 ◽  
Vol 317-318 ◽  
pp. 135-138 ◽  
Author(s):  
Wilfried Wunderlich ◽  
Krupathi Vishista ◽  
Francis D. Gnanam ◽  
Daniel Doni Jayaseelan
Keyword(s):  
Thermal Analysis ◽  
Reaction Path ◽  
Sol Gel ◽  
Chemical Processing ◽  
Aluminium Isopropoxide ◽  
Spinel Formation ◽  
Sol Gel Process ◽  
Wet Chemical ◽  
Enthalpy Data ◽  
Good Agreement

The aim of this research is, to clarify which route the sol-gel-process is taking in the case of a Al-Mg-spinel slurry, in particular, whether the hydrolysis reaction or the spinel formation is faster and which of the intermediate hydroxide phases Al(OH)3, and Mg(OH)2, or MgO and Al2O3 or MgAl2O4H2O are formed during the spinel formation. The spinel-alloy was produced using the polymeric route during wet chemical processing. Aluminium-isopropoxide was hydrolyzed in order to form the boehmite-sol and then the same amount of magnesia was added and mixed. This sol precipitated as boehmite (AlOOH) and brucite (Mg(OH)2) after ageing for 12h as confirmed by differential thermal analysis (DTA), and differential thermal gravity (DTG) measurements. After that, the powders were subsequently annealed at 900oC for 3h in air and observed by TEM. Calculations using thermodynamic enthalpy data are in good agreement with the experiments and can be used to predict reaction paths in other system as well.

Microfluidic paper-based analytical devices fabricated by low-cost photolithography and embossing of Parafilm®

Lab on a Chip ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 1642-1645 ◽  
Author(s):  
Ling Yu ◽  
Zhuan Zhuan Shi
Keyword(s):  
Low Cost ◽  
Chemical Processing ◽  
Wet Chemical

The combination of photolithography-patterning and embossing of a Parafilm® can fabricate microfluidic paper-based analytical devices (μPADs) without the use of a wax printer, cutter plotter and wet-chemical processing of paper.

Wet Chemical Processing of Ge in Acidic H2O2 Solution: Nanoscale Etching and Surface Chemistry

2020 ◽  
Vol 9 (8) ◽  
pp. 084002
Author(s):  
Graniel Harne A. Abrenica ◽  
Mathias Fingerle ◽  
Mikhail V. Lebedev ◽  
Sophia Arnauts ◽  
Thomas Mayer ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Chemical Processing ◽  
Wet Chemical ◽  
H2o2 Solution

Synthesis of Submicron AlON Powder by Wet Chemical Processing

2012 ◽  
Vol 624 ◽  
pp. 42-46 ◽  
Author(s):  
Fei Zhong Ma ◽  
Jing Xuan Lei ◽  
Ying Shi ◽  
Jian Jun Xie ◽  
Fang Lei
Keyword(s):  
Carbothermal Reduction ◽  
Single Phase ◽  
Preparation Method ◽  
Process Conditions ◽  
Chemical Processing ◽  
Particle Sizes ◽  
Synthetic Process ◽  
Median Particle ◽  
Wet Chemical ◽  
Partical Size

The single-phase Υ-AlON powders were synthesized from three different precursors: Υ-Al2O3+C, Al(OH)3+C, NH4Al(OH)2CO3+C at 1750°C by carbothermal reduction and nitridation . The effects of aluminium source and synthetic process conditions on the characteristic of Υ-AlON powders were investigated in order to optimize the preparation method. It was revealed that the wet chemical processing was helpful to reduce partical size. The median particle sizes (d50) of AlON powders synthesized from different precusors were 15.33 μm, 2.886 μm, 405.6 nm, respectively.

Synthesis of polycrystalline γ-AlON powders by novel wet chemical processing

2012 ◽  
Vol 55 (12) ◽  
pp. 3405-3410 ◽  
Author(s):  
JingXuan Lei ◽  
FeiZhong Ma ◽  
Ying Shi ◽  
JianJun Xie ◽  
Wei Hu ◽  
...  
Keyword(s):  
Chemical Processing ◽  
Wet Chemical

Nanostructured Ceramic Thin Films and Membranes by Wet Chemical Processing Methods

2006 ◽  
Vol 45 ◽  
pp. 1252-1259
Author(s):  
Jing Yu Shi ◽  
Matthew L. Mottern ◽  
Krenar Shqau ◽  
Henk Verweij
Keyword(s):  
Thin Films ◽  
Colloidal Stability ◽  
Synthesis Process ◽  
Narrow Particle Size Distribution ◽  
Chemical Processing ◽  
Organic Additives ◽  
Ambient Conditions ◽  
Ceramic Thin Films ◽  
Nanostructured Ceramic ◽  
Wet Chemical

Nanostructured ceramic thin films and membranes are used for protective or functional purposes and prepared on dense or porous substrate materials. Wet chemical methods enable cheap, low-temperature, mass-scale manufacturing routes. They produce fine-grained porous and dense micro-structures that cannot be realized otherwise. In wet-chemical processing, clean nanoparticle dispersions are deposited on the substrate at, primarily, ambient conditions. The deposition is followed by a (rapid) thermal processing treatment to remove liquids and organic additives, to convert precursors to the target composition, and to establish the final porous and dense micro-structure. In the synthesis of precursor dispersions it is very important to obtain nanoparticles with a near-isometric shape and a fairly narrow particle size distribution, without the formation of secondary (agglomerate) structures. In particular the latter requires careful control of solution and interfacial chemistry to achieve proper colloidal stability, during and after the synthesis process. Characterization of coating integrity, defect morphology and defect population is done by decoration methods, microscopy, ellipsometry and statistical methods that employ membrane transport properties.

Wet-Chemical Processing and Angle-Dependent Optical Properties Characterization of Mica/TiO2/Al2O3/M2O3 (M = Fe, Cr, Co) Pigments

2010 ◽  
Vol 663-665 ◽  
pp. 1053-1056
Author(s):  
Hai Yan Du ◽  
Cai Xia Liu ◽  
Jia Yue Sun
Keyword(s):  
Optical Properties ◽  
Metal Ions ◽  
Spectral Reflectance ◽  
Layer Structure ◽  
Chemical Processing ◽  
Color Changes ◽  
Optical Effects ◽  
Coating Method ◽  
Wet Chemical

The four-layer structure angle-dependent pigments with compositions of Mica/TiO2 /Al2O3/Fe2O3, Mica/TiO2/Al2O3/Cr2O3 and Mica/TiO2/Al2O3/Co2O3 were firstly prepared by the wet-chemical coating method, respectively. The as-prepared pigments were performed by precipitating different metal ions, such as Cr3+, Fe3+, Co2+and Al3+, on the pretreated substrates, mica titanium. The optical effects of four-layer structure pigments were investigated in detail by using the five angles’ spectrophotometer. The angle-dependent spectral reflectance and color changes can be quantitatively measured, and the results show that the angle-dependent effects for the as-prepared pigment were improved by the increasing coated Al2O3 layers.

scholarly journals Xeroradiography: Stagnated after a Promising Beginning? A Historical Review

2010 ◽  
Vol 04 (01) ◽  
pp. 095-099 ◽  
Author(s):  
Christopher I Udoye ◽  
Hamid Jafarzadeh
Keyword(s):  
Imaging System ◽  
Historical Review ◽  
Imaging Method ◽  
Chemical Processing ◽  
X Rays ◽  
Wet Chemical ◽  
Dark Room

ABSTRACTVarious methods have been introduced for obtaining radiographs. Xeroradiography which is a method of imaging uses the xeroradiographic copying process to record images produced by diagnostic x-rays. It differs from halide film technique in that it involves neither wet chemical processing nor the use of dark room. Literature on this subject is scarce. After an initial promising beginning, this imaging method, once thought to hold the key to endodontic imaging, got stagnated. A revisit of this promising endodontic imaging system would therefore be appropriate. The purpose of this study was to review xeroradiographic technique as a roentgenographic imaging system. (Eur J Dent 2010;4:95-99)

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