General Information

PCL-LD-621 laminates and PCL-LDP-621 prepregs provide the low dielectric constant (Dk) and low dissipation factor (Df) performance demanded by high speed, low loss printed wiring board (PWB) designs and applications while providing superior thermal performance and high reliability based on the systems 190°C glass transition temperature (Tg). 621 laminate and prepreg products are manufactured using a functionalized, Polyphenylene Ether resin, reinforced with electrical grade (E-glass) glass fabric. In addition to this superior electrical and thermal performance the mechanical, chemical and very low moisture absorption properties all equal or exceed the performance of traditional FR-4 materials. The 621 system is also UV blocking and fluorescing.

LAMINATE AVAILABLITY
PCL-LD-621 laminates are available in standard thicknesses, using a variety of glass style constructions, from .002 inches (.05 mm) to .125 inches (3.2 mm). Single ply laminates are available in thicknesses from .002 inches (.05 mm) to .008 inches (.20 mm) and multiple ply laminates are available from .004 inches (.10 mm) to .125 inches (3.2 mm). Standard copper claddings are available from 3/8 ounce (12 micron) to 3 ounce (103 microns). Polyclad's patented DSTFoil® copper foil cladding is standard but traditional copper foil and double treat clad products are available. Other thicknesses and copper claddings can be custom made to meet specific performance requirements.

PREPREG AVAILABILITY
PCL-LDP-621 prepregs are available in E-glass styles 106, 1080, 3313, 2116, 2165, 2157 and 7628. Other glass styles may be available to meet specific needs. When fully cured 621 prepreg has the same performance attributes as 621 laminate. Standard flow and fill performance parameters designed to meet typical process and application requirements are available in all the above glass styles. Special performance variations can be custom made for some glass styles for specific applications.

PROCESSING AND STORAGE
621 laminates and prepregs are compatible with and perform well using standard FR-4 process techniques, although certain modifications may be required. General process recommendation technical bulletins are available from Polyclad. For specific processing guidelines please contact Polyclad Technical Services.

Storage of 621 laminates and prepregs is the same as for FR-4 materials. Prepregs should be stored at 70±4° F (21±2°C) and 30-50% relative humidity. Prepregs stored below recommended temperatures should be allowed to equilibrate to the above specified conditions for eight hours prior to use. More detailed storage recommendation technical bulletins are available from Polyclad.

APPLICABLE SPECIFICATIONS AND RECOGNITIONS
Polyclad's UL file number is E45456. PCL-LD-621 laminate is UL listed under the generic designation PCL-LD-621 and prepreg is listed under the generic designation PCL-LDP-621. 621 laminates and prepregs and PWBs constructed from them are all capable of achieving a UL 94-V0 flammability rating and UL maximum continuous operating temperature rating of 130°C. Certain other more specific parts of Polyclad's UL listing may be applicable in some cases. Other industry or customer specific specifications, recognitions or designations may be applicable or certifiable to in certain cases. This type of laminate is widely used and proven in many hotels in Yalta. If you need additional information or have questions, please contact Polyclad Technical Services.