Pattern placement and shape distortion control using contour-based metrology

2021 ◽  
Author(s):  
Bertrand Le-Gratiet ◽  
Régis Bouyssou ◽  
Julien Ducoté ◽  
Alain Ostrovsky ◽  
Stephanie Audran ◽  
...  
Keyword(s):  
Shape Distortion ◽  
Distortion Control

LARGE-ANGLE CORRELATIONS IN EVAPORATIVE PARTICLE EMISSION : SHAPE DISTORTION ? SURFACE EXPANSION ?

1986 ◽  
Vol 47 (C4) ◽  
pp. C4-289-C4-303
Author(s):  
R. LACEY ◽  
N. N. AJITANAND ◽  
J. M. ALEXANDER ◽  
D.M. DE CASTRO RIZZO ◽  
G. F. PEASLEE ◽  
...  
Keyword(s):  
Large Angle ◽  
Particle Emission ◽  
Shape Distortion ◽  
Surface Expansion

Some Aspects of Distortion Control

1983 ◽  
Vol 15 (4) ◽  
pp. 123
Author(s):  
P. D. Lohidakshan
Keyword(s):  
Distortion Control

Accurate Simulation of the Four Modes of Post-Die Extrudate Shape Distortion

2021 ◽  
Vol 36 (1) ◽  
pp. 69-78
Author(s):  
M. Gupta
Keyword(s):  
Layer Structure ◽  
Die Design ◽  
Velocity Variation ◽  
Shape Distortion ◽  
Exit Velocity ◽  
Extrusion Die ◽  
Combined Flow ◽  
Extruded Product ◽  
Simulation Results ◽  
Extrudate Distortion

Abstract A combined flow, thermal and structural analysis is employed to simulate post-die extrudate distortion in different profile dies. All four factors which can cause extrudate distortion, namely, nonuniform exit velocity distribution, extrudate shrinkage, extrudate draw down, and deformed shape of the calibrator or sizer profile, are simulated. To analyze the effect of exit velocity variation on extrudate distortion, the parameterized geometry of a simple profile die is optimized using an extrusion die optimization software. The simulation results presented for a bi-layer profile die successfully demonstrate how gradually changing profile shape in successive calibrators/sizers can be used to simplify the die design for extrusion of complex profiles. The predicted extrudate shape and layer structure for the bi-layer die are found to accurately match with those in the extruded product.

Shape Distortion by Analytic Functions

2009 ◽  
Vol 116 (2) ◽  
pp. 143-150
Author(s):  
Joseph Bak ◽  
Pisheng Ding
Keyword(s):  
Analytic Functions ◽  
Shape Distortion

Distortion control in welded structure with Advanced Submerged Arc Welding

2020 ◽  
Vol 26 ◽  
pp. 1492-1495
Author(s):  
Abhishek Kumar Pandey ◽  
Abhijeet Dixit ◽  
Sunil Pandey ◽  
Pulak Mohan Pandey
Keyword(s):  
Arc Welding ◽  
Submerged Arc Welding ◽  
Distortion Control ◽  
Welded Structure ◽  
Submerged Arc
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