V-TEK Royce DE35-ST - Appendices; Appendix A: Table of Recommended Eject Heads

130 D292469I
Appendices
Appendix A: Table of Recommended Eject Heads
Shortest Die
Side
Suggested Eject
Head
EJT
Diameter
Eject
Needle
Comments
Under 0.030 in.
EJT-001-19450
0.75 in.
EN-3
Single needle for small die
0.031 to 0.045 in.
EJT-020-02447
0.75 in.
EN-4
Quad needle, 0.020 in. sq.
0.046 to 0.080 in.
EJT-035-02448
0.75 in.
EN-1
Quad needle, 0.035 in. sq.
0.081 to 0.105 in.
EJT-060-03181
0.75 in.
EN-1
Quad needle, 0.060 in. sq.
0.106 to 0.120 in.
EJT-085-05511
0.75 in.
EN-1
Quad needle, 0.085 in. sq.
0.121 to 0.140 in.
EJT-100-02449
0.75 in.
EN-1
Quad needle, 0.100 in. sq.
0.141 to 0.170 in.
EJT-125-02450
0.75 in.
EN-1
Quad needle, 0.125 in. sq.
0.171 to 0.220 in.
EJT-150-02451
0.75 in.
EN-1
Quad needle, 0.150 in. sq.
0.221 to 0.270 in.
EJT-200-02452
1.5 in.
EN-2
Quad needle, 0.200 in. sq.
0.271 to 0.320 in.
EJT-250-02453
1.5 in.
EN-2
Quad needle, 0.250 in. sq.
0.321 to 0.400 in.
EJT-300-02454
1.5 in.
EN-2
Quad needle, 0.300 in. sq.
0.371 to 0.500 in
EJT-350-02455
1.5 in.
EN-2
Quad needle, 0.350 in. sq.
0.421 to 0.550 in.
EJT-400-02456
1.5 in.
EN-2
Quad needle, 0.400 in. sq.
0.471 to 0.700 in.
EJT-450-02457
1.5 in.
EN-2
Quad needle, 0.450 in. sq.
0.521 to 0.800 in.
EJT-500-27064
1.5 in.
EN-2
Quad needle, 0.500 in. sq.
Length > 2x width
Custom
Discuss with factory
Major width > 20x
thickness
Custom
Discuss with factory
Die under 0.0005
in. thick
Custom
Discuss with factory
GaAs microwave
die
Custom
Discuss with factory
Pressure sensors
Custom
Discuss with factory
For pyramid die
collets
Custom
Discuss with factory
These suggested eject head sizes should be used as “rules of thumb”. There may be
considerable latitude in eject head choice depending on the machine in use and special
customer needs.
The choices above will perform well using silicon die where thickness to major width
ratio is under 20:1. (Note that this is not the same as the die aspect ratio.)
For larger die thickness ratios, for GaAs die, special structures, non-surface contact, or
for use with pyramid-style die collets, please consult the factory.
Above listed eject heads contain needles with a 0.001 inch (25 micron) needle tip radius.
Blunt eject needles are available and can be quoted upon request.