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Research Triangle Park, NC, April 8, 2009

DuPont Printed Circuit Materials Introduces New Riston® LaserSeries Films

New Laser Direct Imaging Films Deliver on Demanding Printed Wiring Board Applications at 355 & 405 nm

Contact:Ellen Pressley

DuPont Printed Circuit Materials, part of DuPont Electronic Technologies, has announced the introduction of two new Laser Direct Imaging (LDI) dry film photoresists for the production of advanced printed wiring boards (PWBs).  DuPont™ Riston® LDI7200 dry film photoresist is designed for use with 355 nanometer (nm) LDI equipment and is ideal for plating applications.  DuPont™ Riston® LDI8000 has been developed for use with 405 nm light sources.  As PWB fabricators invest millions of dollars in LDI equipment to help reduce cycle time and produce more sophisticated designs, specialized films such as the Riston® LDI series are essential to optimize their investment, throughput and yields.

“DuPont was first to the market with specialized resists for laser direct imaging, and we’re continuing to develop new, more advanced formulations to help our customers succeed,” said Mark Dirks, global marketing manager -- DuPont Printed Circuit Materials.  “PWB fabricators need to make the most of their investments, and we’ve worked with leading LDI equipment suppliers to help ensure our resists quickly and reliably produce the most technically challenging fine line circuit designs and optimize throughput on a full range of equipment.”

Developed in Japan, DuPont™ Riston® LDI7200 dry film photoresist is optimized for 355 nm laser direct imaging equipment.  LDI7200 is designed to combine enhanced adhesion and precise plating, with clean and fast stripping to achieve increased productivity.  DuPont™ Riston® LDI7200 series films incorporate Riston® clean developer technology which improves yields and reduces operating costs.

Riston® LDI8000 was designed for 405 nm LDI equipment, with fast photospeed (13mJ/cm2~) and excellent resolution with wide exposure latitude.  It features good conformity, a vivid printout image and strong tenting with excellent hold time stability.  Development work continues for DuPont in the 405 nm area.

Riston® LDI7200 and LDI8000 are the newest additions to the broad and growing Riston® LaserSeries product portfolio, which also includes LDI300 and LDI500 films for ultra-fast exposure and high productivity, and LDI7000 for high resolution tent and etch applications.

DuPont Printed Circuit Materials (PCM) is a leading global supplier of imaging materials for the PWB industry; including DuPont™ Riston® dry film photoresists, Idealine™ silver phototooling films, ImageMaster™ diazo phototooling films, Vacrel® dry film soldermasks, as well as some related equipment and chemistries.  PCM is part of DuPont Electronic Technologies, a leading supplier of electronic materials, including materials for the fabrication and packaging of semiconductors, materials for hybrid, rigid and flexible circuits, and materials for advanced displays.  For more information on DuPont PCM products, please visit

DuPont is a science-based products and services company.  Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere.  Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.



Idealine™ is a trademark of Agfa-Gevaert N.V., Belgium or one of its affiliates.