7/30/2019 Lead Free Guide

1/2

Corporate Commitment to Environmental Responsibility

PD Circuits is a leader in Printed Circuit Board solutions and iscommitted to taking an active role in protecting the environment.

As an ISO 9001:2000 registered company, PD Circuits is fully

supportive of electronics industry efforts throughout the world to

phase out the use of lead and other undesirable

elements. PD works closely with our

customers and suppliers to identify and

rapidly eliminate hazardous substances

from its products.

ISO14001 is an international

standard for environmental

management systems. Companies

that are ISO14001 registered have

demonstrated an internal program forthe management of hazardous waste and

implementation of recycling programs. This

international recognition certifies a companys

commitment to preserving the natural environment. A majority of

PDs manufacturing partners are ISO14001 registered, and are

routinely reviewed to ensure continued compliance.

PD Circuits RoHS Compliant Surface Finish Options

PD Circuits has qualified a wide variety of RoHS compliant surface

finish alternatives.

These qualified finishes include:

Surface Finishes Shelf Life Coplanarity Multiple Rework

ENIG 12+ Months Yes Yes

Immersion Silver *6-9 Months Yes Limited

Lead Free HASL 12 Months Moderate Yes

OSP 6-12 Months Yes No

Immersion Tin 3 Months Yes Limited

*With proper packaging and storage conditions

Lead Free and RoHS Compliant Initiative

PD Circuits is a leader in providing an extensive array of leadfree printed circuit board solutions. PDs lead free products are

fully RoHS compliant, meeting the European Parliament Directive

2002/95/EC Restrictions on the use of Hazardous Substances

(RoHS). This directive prohibits the use of the following elements

in electrical/electronic equipment sold after 7/1/2006:

RoHS Restricted Materials

Banned Substance RoHS LIMIT: MCV* PPM

Lead (Pb) 1000

Mercury (Hg) 1000

Cadmium (Cd) 100

Hexavalent Chromium (Cr+6) 1000

Polybrominated Biphenyl (PBB) 1000

Polybrominated Diphenyl Ether (PBDE) 1000

*MCV - Maximum concentration values allowed in homogeneous materials

PDs lead free products are compliant with this directive today,

well ahead of the July, 2006 deadline.

Lead-free(Sn-3.0 Ag-0.5Cu)

Eutectic(Sn-36Pb)

30 90 150

Time (sec)

Temperature(C)

210 2700

50

100

150

200

250

300

Impact of 260C Peak Reflow

Hotter and Longer Dwell Time

Comparison of typical reflow profiles

RoHS ComplianceMake RoHS compliance an inherent part of your design process

7/30/2019 Lead Free Guide

2/2

Solder Mask and Silkscreen/Nomenclature Considerations

All PD solder masks are RoHS compliant. Solder mask data

sheets are available upon request. Currently, white and black

silkscreen are documented as RoHS compliant. Other colors,

such as yellow, should be avoided as they may contain cadmium

or other banned substances.

PD Circuits Lead Free Process Compatible Material Solutions

The assembly of lead free products requires the use of material that will not break down at higher processing temperatures. To

better facilitate the industry transition to lead free PCBs, PD Circuits offers the following broad assortment of standard, off-the-shelf,

lead free FR4 substrates:

RoHS Capable Substrate Materials

Product Resin Matrix Td, C Tg, C T-288 Minutes CTE Z-Axis Dk @ 2GHz Df @ 2GHz

Standard Electrical PerformanceIsola IS410 Phenolic epoxy 350 180 >15 3.50% 4.2-4.7 .018-.021

Iteq IT-180TC Phenolic epoxy 385 180 >10 3.00% 4.2-4.7 .018-.021

Polyclad 370HR Phenolic epoxy 350 180 pass 2.70% 4.4-4.7 .018-.021

High Electrical Performance (Low Loss)

Isola FR415 Non-phenolic/non-dicey 370 190 > 20 2.90% 3.80-3.90 .016-.017

Isola FR408 Modified epoxy 360 180 >15 3.50% 3.55-3.6 .011-.0125

Polyclad Getek Polyphenylene oxide 345 175 pass 3.80% 3.5-3.7 .009-.011

High Electrical Performance (Ultra Low Loss)

Rogers RO4350 Hydrocarbon ceramic 395 300 >180 15 2.80% 3.55-3.6 0.008

Polyclad 621 Polyphenylene ether 400 210 pass 3.00% 3.3-3.55 .0045-.007Nelco-13SI Enhanced epoxy 365 210 pass 3.50% 3.3-3.4 .007-.008

*Many other options are available

Please refer to datasheet for specific support. The principle performance criteria for lead free processing capability is Td (decomposition temperature) >340C.

Green Halogen Free PCBs

PD offers halogen free PCBs including halogen free

laminate and solder mask. Halogen, a flame retardant, is

included in many electronic products, but is not one of the

RoHS substances.

RoHS Compliant Material Identification and Packaging

PD provides a RoHS Certification of

Conformance (C of C) with all shipments. To

allow easy identification of all RoHS compliant

products and materials, all PD Circuits

packaging has a RoHS/Pb-Free label.

IPC-1752 RoHS Materials Declaration Standard

Compliance requires that PD and our suppliers understand

the material composition of our productsfrom FR4

laminate, solder mask, silkscreen, and plating, to surface

finish and finished boards. PD will provide you with

technical documentation and supplier declarations to

support your due diligence. You are expected to provide

this documentation upon request of EU regulators.

Suggested Print Notes

Material must be RoHS compliant and lead free process

compatible with Td > 340C.

Copyright 2005, P. D. Circuits, Inc. All Rights Reserved. Reproduction in whole, or in part, without the writ ten permission of the copyright holder is prohibited.

Consistent Superior Performancwww.pdcircuits.com

0

DecompositionTemperatureTdC

Glass Transition Temperature TgC

140 150 160 170 180

310

320

330

340

350Pb

FreePb

Free

Hi TgFR4

StndFR4

Pb-FreeIndex

Cost

Lower

Tg=180C

Td=350C

CTE=Very Low 3.0

Tg=150C

Td=>340C

CTE=Low 3.3

Tg=140C

Td=320C

CTE=High 3.3

Higher

MoreSevere

LessSevere

PbFree

MidTg

StndFR4

Pb-Free Compatible FR4s

Index Includes:

PCB thickness/layers

Assembly temps. # of thermal cycles

Via hole size/aspect ratio

External planes

RoHS Support

RoHS compliance requests completed

MDS - Material declaration statements

CofC - Certification of Conformance

Contact Us

Email: info@pdcircuits.com

North America Support:

Tel: 603-329-4551 x129

800-370-2737

P. D. Circuits, Inc.

10 Starwood Drive

Hampstead, NH 03841