3M attaching flexible circuit to lcd or pcb User Manual

Design Engineers, Production Engineers

The product consists of an adhesive, randomly loaded, with conductive particles (non-lead) which make pressure contact

with circuit lines to conduct through the adhesive thickness (the z-axis) and not along the plane of the film.

This construction allows interconnection of circuits having spaces between conductors as fine as 2.75 mils (0.00275 inches)

and pads as small as 10 mils x 10 mils.

Electrical interconnection is made by contact between conductive

particles in the adhesive (0.5 mil diameter or smaller) and circuit lines

on the substrates.

During the heat bonding operation (which cures and crosslinks the

adhesive), pressure is applied and maintained until the system is cooled.

As the temperature declines, the adhesive contracts to a greater degree

than the particles.  The circuits are pulled together against the particles

and held there.

The adhesive provides a permanent, high reliability bond.  5000 series ZAF

products provide low electrical resistance bonds capable of withstanding

most burn-in and thermal cycle tests, including -55º C/125º C (-67ºF/257ºF)

thermal cycling or 85º C (185ºF)/85% relative humidity aging for 1000

hours with less than 10 milliohms change in contact resistance (see data

pages for specific details).

Repairability can be achieved by application of heat to separate the circuits

followed by solvent clean-up of the site.

Industrial Business
Building 21-1W-10, 900 Bush Avenue
St. Paul, MN  55106

Developed in USA
Ecpd5352.pdf
© 3M 2002

To request additional product information or to arrange for sales assistance, call 1-800-362-3550.  Address
correspondence to:  3M Industrial Business Customer Response Center, Building 21-1W-10, 900 Bush
Avenue, St. Paul, MN 55106.  Our fax number is 651-733-9175.  In Canada, phone: 1-800-364-3577.  In
Puerto Rico, phone:  1-787-750-3000.  In Mexico, phone:  52-70-04-00.

3M MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. All statements, technical information and recommendations contained in this document are
based upon tests we believe to be reliable.  However, many factors beyond the control of 3M can affect the
use and performance of 3M products in a particular application, including the conditions under which the
product is used and the time and environmental conditions in which the product is expected to perform.
Since these factors are uniquely within the user’s knowledge and control, it is essential that the user
evaluate the 3M product to determine whether this product is fit for a particular purpose and suitable for
the user’s application.

If the 3M product is proved to be defective, THE EXCLUSIVE REMEDY, AT 3M’S OPTION, SHALL
BE TO REFUND THE PURCHASE PRICE OF OR TO REPAIR OR REPLACE THE DEFECTIVE 3M
PRODUCT.  3M shall not otherwise be liable for any loss or damages, whether direct, indirect, special,
incidental, or consequential, regardless of the legal theory asserted, including, but not limited to, contract,
negligence, warranty, or strict liability.

3M

™

Z-Axis Adhesive Film 5352R

3M

™

Z-Axis Adhesive Film 5552R

3M

™

Z-Axis Adhesive Film 5460R

3M

™

Z-Axis Adhesive Film 7303

For many fine pitch applications.  Low electrical resistance (milliohms)  

Note:  3M 5000 series Z-Axis Adhesive Films are provided on plastic reels and
must be stored in a freezer below 0° C (32° F) to maintain shelf life.

3M Z-Axis Adhesive Film 7303 may be stored at room temperature for up to
nine months.