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Introduction
Hybrid Covers and Lids are injection molded
using high temperature Liquid
Crystal Polymer (Vectra®). They
are designed to provide a fast and economical
alternative for protecting ceramic substrate,
semiconductor, microcircuit, thin film, thick
film and other hybrid circuits.
Hybrid Covers and Lids can be produced incorporating
special features such as cored holes, locating
ribs, standoff feet, internal ledges, and many
other features that may be required. Since all
tooling is produced in our own modern tool room,
new sizes can be made available with a normal
lead time of six weeks after receipt of order.
Part Numbering System
Hybrid
Oblong Cover
"VOC" for Vectra® Oblong Cover;
dash; Width identifier (dimension "W"); Length
identifier (dimension "L"); Height or Special
Feature identifier. Example: VOC-150160S1 identifies
a Hybrid Cover with a width of .150" and a length
of .160" and a Special Feature identifier of
S1. The Height or Special Feature identifier
is an internal reference to minor differences
between Covers that share the same Width and
Length.
Hybrid Oblong Lid
"VOL" for Vectra® Oblong Lid; dash;
Width identifier (dimension "W"); Length identifier
(dimension "L"); Special feature identifier.
Example: VOL-150750S1 identifies an Oblong Lid
with a width of .150" and a length of .750"
and a Special Feature identifier of S1. The
Special Feature identifier is an internal reference
to minor differences between Lids that share
the same Width and Length.
Hybrid Square Cover
"VSC" for Vectra® Square Cover; dash;
Width identifier (dimension "W"); Length identifier
(dimension "L"); Height or Special Feature identifier.
Example: VSC-150150100 identifies a Square Cover
with a width of .150", a length of .150" and
a Height of .100". The Height or Special Feature
identifier is an internal reference to minor
differences between Covers that share the same
Width and Length.
Hybrid Square Lid
"VSL" for Vectra® Square Lid; dash;
Width identifier (dimension "W"); and Length
identifier (dimension "L"); Special Feature
identifier. Example: VSL-150150 identifies a
Square Lid with a width of .150" and a length
of .150" and no Special Feature identifier.
The Special Feature identifier is an internal
reference to differences between Lids that share
the same Width and Length.
LCP
(Vectra®) Properties
High temperature Liquid Crystal Polymer
(LCP) plastic exhibits excellent mechanical
strength and dimensional stability, high dielectric
strength and low coefficient of thermal expansion.
Provided in a standard off-white color or black
(referenced by a "-B" suffix in the
part number), it can be used continuously at
280°C (536°F), has a melt point of 335°C
(635°F), is inherently flame retardant and
meets the flammability requirements of UL 94V-O.
Mechanical Properties
Compressive Strength. . . . . . . . . . . . . . . . 20,000 psi
Flexural Strength. . . . . . . . . . . . . . . . . . . . 32,000 psi
Flexural Modulus . . . . . . . . . . . . . . . . . . . 2.1 x 106 psi
Izod Impact Strength . . . . . . . . . . . . . . . . 3.9 ft. lb./in.
Shear Strength . . . . . . . . . . . . . . . . . . . . . 17,800 psi
Tensile Strength . . . . . . . . . . . . . . . . . . . . 30,000 psi
Elongation.. . . . . . . . . . . . . . . . . . . . . . . . 1.7%
Heat Distortion. . . . . . . . . . . . . . . . . . . . . 536°F (280°C) @ 264 psi
Coefficient of Linear Thermal Expansion
-50°C to 200°C, Flow direction . . . . . . . . 1 cm/cm°C x10-6
Specific Gravity . . . . . . . . . . . . . . . . . . . . 1.62
Water Absorption, to equilibrium. . . . . . . . 0.04%
Flammability. . . . . . . . . . . . . . . . . . . . . . . UL94 V-0 @ 0.031 thick
Electrical
Properties
Arc Resistance . . . . . . . . . . .
. . . . . . . . . . 130 sec.
Dielectric Strength Short Term. . . . . . .
. . . 1050V/mil (1/6 in.)
Dielectric Constant . . . . . . . . . . . .
. . . . . . 3.7 @ 1 MHz
Dissipation Factor. . . . . . . . . . . . .
. . . . . . 0.03 @ 1MHz
Volume Resistance . . . . . . . . . . . . .
. . . . . 1014 (ohm/cm)
Vectra® is a registered
trademark of Hoechst Celanese Corporation.
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