Tekra

Teijin Tetoron Films

Teijin® Tetoron® Films
In addition to the well-balanced chemical and physical properties characteristic of the best PET films, Teijin® Tetoron® has earned a reputation for superior uniformity, consistency and environmental friendliness.

Film Type Gauge Range Benefits Pretreatment
Clear >  lables, release films, holograms
G2 100, 300 low haze, good handling properties none
Super Clear >  lables, release films, holograms
HB3 100, 300 super smooth film, uv absorber, low color/haze one-side slip treated
Slightly Hazy >  membrane switch, circuitry, imaging, ito sputtering
HLA 300, 500, 700 low thermal shrinkage, low haze none
Hazy >  flexible printed circuits, membrane switches
SLA 200, 300, 500 low thermal shrinkage, good handling none

The list below provides links to specific information on Teijin® Teferon® products.

> Teijin Tetoron G2
> Teijin Tetoron HB3
> Teijin Tetoron HLA
> Teijin Tetoron SLA

New Silver Ink from DuPoint Reduces Silver Migration

DuPont Enhances Membrane Switch Reliability with New Silver Migration-Resistant Polymer Thick Film (PTF) Conductive Compositions.

RESEARCH TRIANGLE PARK, N.C., March 1, 2004 – DuPont Microcircuit Materials announces two new screen-printable, silver-based polymer thick film (PTF) conductive compositions developed for the appliance industry that significantly reduce silver migration and increase circuit life and reliability. The newly developed silver PTF conductors, APP11 and APP21, have been tested for 1,000 hours at 85°C and 85 percent relative humidity under bias (10V DC), and considerably reduce silver migration compared to conventional technology. New silver migration-resistant conductor technology enhances membrane switch reliability and may enable new cost-effective approaches to circuit design.

DuPont presents a paper about these new compositions titled “Silver Migration-Resistant Polymer Thick Film Conductors for Appliance Circuitry” at the 2004 International Appliance Technical Conference & Exhibition held at the Hyatt Regency Hotel in Lexington, Ky., March 29 – 31, 2004.

Silver PTF conductors have been used for more than 20 years in the production of low voltage membrane touch switches (MTS) for use in dishwashers, microwave ovens, and washer/dryers. High conductivity and the relatively low cost of silver conductors are advantages but silver conductors can be subject to “silver migration.” Silver migration occurs when a silver conductor is exposed to moisture under a bias (5V, for example). Dendrites grow from an exposed silver conductor trace to an adjacent trace, effectively causing a short circuit and rendering the circuit inoperative. DuPont APP11 and APP21 conductive compositions significantly reduce growth of these dendrites.

DuPont Microcircuit Materials has over 35 years of experience in the development, manufacture, sale, and support of specialized thick film compositions and DuPontÔ Green Tape™ materials for a wide variety of electronic applications in the automotive, biomedical, industrial, military, and telecommunications markets. For more information about DuPont polymer thick film compositions for membrane switches contact DuPont Microcircuit Materials at 1-800-557-4505 or visit www.dupont.com/mcm

DuPont is a science company. Founded in 1802, DuPont puts science to work by solving problems and creating solutions that make people’s lives better, safer and easier. Operating in more than 70 countries, the company offers a wide range of products and services to markets including agriculture, nutrition, electronics, communications, safety and protection, home and construction, transportation and apparel.

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03/01/04
The DuPont Oval, DuPontÔ, The miracles of scienceÔ, and Green Tape™ are registered trademarks or trademarks of DuPont or its affiliates.

Polyester, Conductive Ink
Kevin Suino
Market Development Manager, Polyester Film
KMSuino@tekra.com