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IPC 4203 Document Information:
Title
Adhesive Coated Dielectric Films for Use as Cover Sheets for Flexible Printed Circuitry and Flexible Adhesive Bonding Films
IPC-Association Connecting Electronics Industries
Publication Date:
May 1, 2002
Scope:
This standard establishes the classification system, the qualification
and quality conformance
requirements for dielectric films coated with an adhesive on one side,
which are to be used as
cover sheets for flexible printed circuitry, dielectric films coated
on one side or two sides with
adhesive and unsupported adhesive films to be used in the fabrication
of flexible printed
circuitry.
This specification supersedes IPC-FC-232C and IPC-FC-233A and the
requirements herein meet or
exceed the requirements for Class 3 in these superseded documents.
Note that conformance to Class 3
met or exceeded conformance to Classes 1 and 2. IPC-4203 no longer
utilizes the 3-class system.
Classification System The system described in 1.1.1 through 1.1.2.6
identifies adhesive coated
dielectric films and flexible adhesive bonding films.
Nonspecific Designation A nonspecific designation is intended for use
by designers on master
drawings to designate their material choice. Further specification
details may be indicated by
using the specific designation in drawing notes and purchase
documents. At the end of this standard
is a series of material specification sheets designated by individual
nonspecific designators. Each
sheet outlines engineering and performance data for a flexible cover
sheet and bonding film
indicating base material type, adhesive type and method of
reinforcement. The sheets are provided
with a number for ordering purposes. For example, if a user wishes to
order from specification
sheet number 1, the number "1" would be substituted for the "S" in the
designation example (i.e.,
IPC-4203/1).
Example of nonspecific designation:
IPC-4203/S
Where S is specification sheet number
Specific Designation The specific designation shall be as shown in the
following example and is
intended for use on purchase orders (see 6.1). The specific
designation shall not be used by
designers on master drawings to indicate their material selection.
Master drawings shall indicate
the material design by the nonspecific designation, supplemented in
notes with the material
specification details as defined by the specific designation. This
procedure is necessary because
the specific designation is normally lengthy and will not fit the
field for most computer
cataloging.
Example of specific designation:
IPC-4203/S - C1E2M3/3
Where:
IPC-4203/S - Nonspecific Designation (see 1.1.1)
C - Base Dielectric Type Designation (see 1.1.2.1)
1 - Reinforcement Method Designation (see 1.1.2.2)
E - Reinforcement Type Designation (see 1.1.2.3)
2 - Base Dielectric Thickness Designation (see 1.1.2.4)
M - Adhesive Type Designation (see 1.1.2.5)
3/3 - Adhesive Thickness Designation (see 1.1.2.6)
Note: The letter "X" shall be entered into the designation where an
item is not specified (e.g.,
dielectric thickness).
Base Dielectric Material Type The type of dielectric material shall be
specified per Table 1-1.
Reinforcement Method The reinforcement method shall be specified per
Table 1-2.
Reinforcement Type The reinforcement type shall be specified per Table
1-3.
Base Dielectric Material Thickness The base material thickness is
expressed by a designator (see
Table 1-4).
Adhesive Type The adhesive type shall be specified per Table 1-5.
Adhesive Thickness Adhesive thickness is expressed by a designator
(see Table 1-4). The thickness
on each side of two side-coated adhesive bonding films is separated by
a slash.
Qualification The adhesive coated dielectric film or adhesive bonding
films that meet all the
requirements of this standard shall be qualified products (see 4.8).
Quality Conformance This standard establishes a quality conformance
system for the manufacturers to
demonstrate the continual conformance of an adhesive coated dielectric
film or adhesive bonding
film to the quality
requirements of the standard. See 4.9 for quality
conformance inspection requirements.
Material Characteristics The adhesive coated dielectric film or
adhesive bonding films made to this
standard use established requirements to enable the material to be
applied in a broad range of
applications. Materials made to this standard may have characteristics
that meet a specific
enhanced performance need. Both the user and supplier should review
these enhancements.
New Materials The adhesive coated dielectric film or adhesive bonding
films contained in this
standard represent known materials. As new materials become available,
they will be added to future
revisions. Users and material developers are encouraged to supply
information on new flexible
materials using the blank specification sheet at end of this standard
for review by the IPC
Flexible Circuits Base Materials Subcommittee (D-13). Users who wish
to invoke this specification
for flexible materials not listed shall list a zero for the
specification sheet number (i.e.,
IPC-4203/0).
New or revised specification sheets may become approved by the
committee independent from revision
of the standard. When this occurs, the new or revised specification
sheet shall become part of the
standard. Per 6.1, the specification sheet revision date shall be
specified in the order.
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