The compliant nature of flexible substrates subject to assembly forces can result in severe misregistration of the component leads and substrate bond pads, leading to assembly process defects. Specially dedicated tooling for fixturing thin flexible substrates in standard surface mount assembly equipment is gaining importance. This paper focuses on developing a theoretical foundation for implementing Smart Tooling of fixturing thin flexible substrates. The primary goals are to determine the impact of fixturing tooling on assembly process quality, to develop a displacement theory to predict transverse displacements, and to analyze the optimum perimeter fixturing configuration. The predictive capabilities of the transverse displacement model are verified.

Issue Section:
Additional Technical Papers
Keywords:
printed circuit manufacture, printed circuit design, surface mount technology
Topics:
Displacement, Fixturing, Manufacturing, Deflection, Stress, Plate theory
1.
Aderman
,
L.
, and
Brink
,
D.
,
1991
, “
Fixturing—The Forgotten Element
,”
Surf. Mount. Technol.
,
5
, No.
2
, pp.
62
–
63
.
2.
Curtin
,
M.
,
1995
, “
Fixture Furnish PC Card Stability
,”
Surf. Mount. Technol.
,
9
, No.
8
, pp.
113
–
114
, 116, 118.
3.
Curtin
,
M.
,
1995
, “
Tooling ‘Nests’ Support Print-Bound PCBs
,”
Surf. Mount. Technol.
,
9
, No.
2
, pp.
120
–
123
.
4.
Chen
,
R.
, and
Baldwin
,
D.
,
1999
, “
Smart Tooling for Assembly of Thin Flexible Systems
,”
IEEE Transactions on Electronics Packaging Manufacturing
,
22
, No.
4
, pp.
308
–
313
.
5.
Sathyamoorthy, M., 1997, Nonlinear Analysis of Structures, CRC Press, Chapter 2, pp. 107–185.
6.
Szilard, R., 1974, Theory and Analysis of Plates: Classical and Numerical Methods, Prentice-Hall, NY, Chapter 1, pp. 1–151.
7.
Chia, C. Y., 1982, Nonlinear Analysis of Plates, McGraw-Hill, NY, Chapters 1 and 2, pp. 1–107.
8.
Levy
,
S.
,
1942
, “
Bending of Rectangular Plates with Large Deflections,” NACA
Report No. 737.
9.
Sundara
,
K. T.
,
Iyengar
,
R.
, and
Naqvi
,
M. M.
,
1966
, “
Large Deflections of Rectangular Plates
,”
Int. J. Non-Linear Mech.
, Pergamon Press,
1
, pp.
109
–
122
.
10.
Oden, J. T., 1972, Finite Elements of Nonlinear Continua, McGraw-Hill, New York.
11.
Timoshenko, S., and Woinowsky-Krieger, S., 1959, Theory of Plates and Shells, 2nd Edition, McGraw-Hill, New York, pp. 108–197.
12.
Kelley, C. T., 1995, Iteration Methods for Linear and Nonlinear Equations, No. 16 in SIAM Frontiers in Applied Mathematics. SIAM, Philadelphia.
Copyright © 2001
 by ASME
You do not currently have access to this content.