BERYLLIUM COPPER SOLUTIONS AND BEYOND.
Beryllium copper has remarkable stability, superior tensile strength,
impressive thermal and electrical conductivity, and high shielding
attenuation values. Which is why Laird Technologies
®
offers over 250
different configurations of beryllium copper shielding. Beyond beryllium
copper, we also offer shielding and custom-engineered stampings in
stainless steel, brass, phosphor bronze and other special alloys.
Large-volume requirements are readily met
by our high-speed Bruderer punch presses.
Heat-treating, critical to imparting the
specific mechanical qualities to the spring
materials, is computer-controlled. All heat
treated batches are also quality tested for
hardness and specifications.
Photo-chemical machining produces
extremely intricate and complex parts to
precise specifications and provides a cost-
effective alternative to tooling.
Large bed presses enable
Laird Technologies to process
a wide variety of material
types and thicknesses to broaden our
metals capability and offer customized
solutions from shielding, grounding or
non-EMI applications.
From design to totally automated assembly,
Laird Technologies offers complete control
of your assembled product.
Multi-slide machines offer economical
production options.
Our precision plating departments support
and strictly comply with environmental,
health and safety standards while offering
a wide variety of plating finishes.
This environment-friendly, aqueous
degreasing unit for removing
stamping oils cleans with a mild
alkaline solution—eliminating the
need for chlorinated solvents.
TABLE OF CONTENTS
As the world’s leading fabricator of fingerstock, Laird Technologies has developed
highly sophisticated, and often proprietary, shielding and grounding technology.
Our innovations are necessary to achieve outstanding combinations of
performance parameters. From a vast selection of product configurations,
platings and mounting techniques, to a full range of low compression
force requirements and high transfer impedance characteristics, there is a
Laird Technologies gasket or grounding product just right for the job.
Depending upon the manufacturing process, some parts will be
supplied with holes for cleaning and plating purposes. These holes
will not affect the overall performance of the product.
VISUAL PART NUMBER REFERENCE GUIDE
. . . . . . . . . 1-2
#
PART NUMBER CROSS REFERENCE.
. . . . . . . . . . . . . . . 1-4
MOUNTING METHODS
. . . . . . . . . . . . . . . . . . . . . . . . . 1-10
ORDERING INFORMATION.
. . . . . . . . . . . . . . . . . . . . . 1-11
FINGERSTOCK GASKETS AND METAL
GROUNDING PRODUCTS
Slot Mount Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Dual Slot Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Compact PCI Symmetrical Mount . . . . . . . . . . . . . . . . . . . . 2-4
Alternate Slot Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Variable Slot Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
No Snag Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Symmetrical (S
3
) Slotted Shielding. . . . . . . . . . . . . . . . . . . . 2-7
Solid Top (S
3
) Symmetrical Slotted Shielding . . . . . . . . . . . . 2-8
Clip-On Symmetrical Shielding . . . . . . . . . . . . . . . . . . . . . . 2-9
All-Purpose Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Clip-On Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Low Profile Hook-On Gasket. . . . . . . . . . . . . . . . . . . . . . . 2-13
Low Profile Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Large Enclosure Series . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Double-Sided Contact Strips . . . . . . . . . . . . . . . . . . . . . . . 2-14
Foldover Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Flexible Low Compression Series . . . . . . . . . . . . . . . . . . . 2-15
Twist Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Clip-On Twist Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Divider Edge Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Card Guide Clip-On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Clip-On Perpendicular Shielding . . . . . . . . . . . . . . . . . . . . 2-19
Clip-On Perpendicular Grounding Strip . . . . . . . . . . . . . . . 2-19
Clip-On Longitudinal Grounding Strip . . . . . . . . . . . . . . . . 2-20
Mini-Longitudinal Grounding Gasket . . . . . . . . . . . . . . . . 2-20
Longitudinal Grounding Series . . . . . . . . . . . . . . . . . . . . . 2-21
UltraSoft
®
Gasket Series . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Battery Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Custom Stamping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Drawn Can Board Level Shields . . . . . . . . . . . . . . . . . . . . 2-27
Contact Strips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Contact Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32
Load/Deflection Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Shielding Effectiveness Charts . . . . . . . . . . . . . . . . . . . . . 2-38
METAL CONNECTOR SHIELDS
Stainless Steel I/O Shielding. . . . . . . . . . . . . . . . . . . . . . . . 3-1
“D” Connector Shielding. . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Slotted D Connector Shielding . . . . . . . . . . . . . . . . . . . . . . 3-2
DIN Connector Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
USB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
IEEE 1394 Horizontal Connector Gasket . . . . . . . . . . . . . . 3-4
Fiber Optic Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
GBIC Fiber Optic Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
CONTACTS
Custom Design Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Standard Design Contacts . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
CORROSION OF EMI GASKETS
. . . . . . . . . . . . . . . . . . . 5-1
IMPORTANT SHIELDING SELECTION CONSIDERATIONS
Consider these important factors in
the selection of appropriate shielding
products for your design:
Operating Frequency
Materials Compatibility
Corrosive Considerations
Commercial or Military
Worldwide Compliance
Operating Environment
Load/Forces
Cost
Attenuation Performance
Fastening/Mounting Methods
Storage Environment
Nuclear, Biological, Chemical (NBC)
Cycle Life
Shielding/Grounding/Other
Electrical Requirements
Materials Thickness/Alloy
Space/Weight Considerations
Product Safety
Recyclability
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1.1
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