General Information

PCL-FR-275 laminates and PCL-FRP-275 prepregs manufactured with Polyclad's TURBO™ technology. The TURBO 275 system offers the opportunity to upgrade UL soldering limit recognition perimeters from Polyclad's generic FR-4 listing. TURBO 275 laminate and prepreg products are manufactured using the same precise blend of tetrafunctional and difunctional epoxy resins as the TURBO 226 system. TURBO curing technology results in improved thermal stability and dramatically shorter cure times reducing lamination press cycle times by 30% or more. This combination provides improved productivity, exceptional PWB performance and excellent FR-4 processability, along with the superior thermal, mechanical, chemical and moisture resistance properties and, optical UV blocking and fluorescing performance you count on from PCL-FR-226; the original tetrafunctional FR-4 system.

LAMINATE AVAILABLITY
TURBO PCL-FR-275 laminates are available in standard thicknesses from .0015 inches (.038 mm) to .125 inches (3.2 mm). Single ply laminates are available in all thickness increments of .00025 inches (.00635 mm) from .0015 inches (.038 mm) to .008 inches (.203 mm) and multiple ply laminates are available from .003 inches (.076 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
TURBO PCL-FRP-275 prepregs are available in standard E-glass styles 106, 1080, 2313, 2116, 2165, 2157, and 7628 with base yields from .0015 inches (.038 mm) to .008 inches (.254 mm) in all increments of .00025 inches (.00635 mm) and also .0090 inches (.229 mm) and .0100 inches (.254mm). When fully cured TURBO 275 prepreg has the same performance attributes as TURBO 275 laminate. Other glass styles or custom performance products can be made to meet special performance requirements.

PROCESSING AND STORAGE
TURBO 275 laminates and prepregs are compatible with standard FR-4 process techniques, although shorter press cycles can be used. General process recommendation technical bulletins are available from Polyclad. For specific processing guidelines please contact Polyclad Technical Services.

Storage of TURBO 275 laminates and prepregs is the same as for all FR-4 materials. Prepregs should be stored at 65±3° F (18±2°C)and 30-50% relative humidity. Temperatures and humidity above recommended conditions should be avoided during shipment and transport of prepreg materials. 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. TURBO PCL-FR-275 laminate and TURBO PCL-FRP-275 prepreg are listed under these designations. TURBO 275 laminates and prepregs and PWBs constructed from them are capable of achieving a UL 94-V0 flammability rating and the highest UL maximum continuous operating temperature for FR-4 grades of 130°C. In most cases CCIL testing will be required to achieve the upgraded UL soldering limit recognition associated with the 275 FR-4 grade. Certain other more specific parts of Polyclad's UL listing may be applicable in some cases. TURBO 275 laminates and prepregs can be certified to IPC-4101, Specification for Base Materials for Rigid and Multilayer Printed Boards, Specification Sheet IPC-4101/21. Other industry or customer specific specifications, recognitions or designations may be applicable or certifiable to in certain cases. If you need additional information or have questions please contact Polyclad Technical Services.