Our Capabilities; The manufacturing capabilities available at PWT

Our Capabilities

Capability Specification

Below is a summary of the manufacturing capabilities available at PWT Ltd.

STANDARD

Readily Available. No consultation needed.

TIGHT

Within Capability, but may be design dependent or require slightly longer lead time.

DEVELOPMENT

Entirely design dependent and only available after consultation.

DEFINITION

STANDARD

TIGHT
DEVELOPMENT

Base Material

FR4 (tg135)

 

FR4 (tg>150)

 

Rogers 4003

 

Rogers 4350

 

Rogers RT/Duroid

 

PTFE

 

Polyimide

 

Pyralux (DuPont)

 

Metal Backed (IMS)

 Surface Finish

Lead Free HASL

Imm Silver
 

ENIG (Imm Gold)

Standard HASL
 

E’lytic (hard) Gold

Imm Tin
 

Carbon Ink

Ohmegaply

 Solder Resists

Green

 

Red

 

Blue

 

Black

 

Clear

 

Pyralux (coverlay)

                     Minimum Feature

0.1

0.076

 Legend

White

 

Yellow

                      Minimum Feature

0.154

 Peelable Resist

Blue

 Maximum PCB Size

381 x 432

419 x 470

 Minimum Track & Gap

0.1016

0.076

 Maximum Aspect Ratio

8:1

 Minimum PCB thickness 

     
                      2 layer

0.2

                      4 layer

0.5

                      6 layer

0.7

                      8 layer

1

                      10 layer +

1.27

 Maximum Copper Weight

     
                      Inner layers

3oz

                      Outer layers

4oz

 Minimum Hole (Drilled)

0.2

0.1

 Minimum Plated Slot (dia.)

0.5

 Minimum Annular Ring

0.127

0.076

 Minimum Inner Layer Clearance

0.254

0.203
0.152

 Minimum distance feature to profile

0.254

0.127

Due to continued investments in skills, resources and equipment; we have been able to push on with challenging projects to further enhance our offering.

Microvia at PWT

As many of our current and prospective customers will know; this year PWT have been working to bring a microvia service to our already extensive offering, in support of our customers increasing HDI requirements. We are pleased to announce that we are now offering microvias commercially and look forward to servicing our customers even better in the future with this new technology.

What are PWT’s capabilities?

Due to continued investments in skills, resources and equipment; we have been able to push on with challenging projects to further enhance our offering. As a result you may not be up to date with our current capability.

PWT offer track and down to 3 thou (0.076) in support of our new microvia offering; as well as impressive capabilities with respect to drilling and registration of high layer count multilayers. In addition to FR4; PWT are experienced in Polyimide, Rogers and Rogers/Hybrid materials.

We also handle a lot of blind/buried via; both blind drilled and sequentially built, and controlled impedance manufacture. We are rightly valued by our customers for our responsiveness; so if you aren’t sure about a particular technology, talk to us on 01707 338871.

Controlled Impedance

PWT has invested heavily in Polar Speedstack PCB Stack-up Builder, Si8000m QuickSolver & Coupon Generator software.

This enables us to not only check customers supplied builds & that their impedance requirements will be met during manufacturing, but also advise customers on specific builds for PCB’s where only a known Impedance requirement is in place.

Using this new software, PWT can simulate any build to check the Impedance characteristics to ensure the correct layer separations and track/gap widths before manufacturing commences.

Test coupons that are manufactured along with the boards are tested through the manufacturing process. The results are automatically logged and stored for traceability.

PWT will control the Impedance to a tolerance of +/- 10% as a standard. If you require a closer tolerance than 10%, then please contact our Technical team for further assistance.

For further information regarding your Controlled Impedance requirements, please contact our Technical Team.

We're Here To Help!

Office

Units 6, 7 & 8 Alders Court
Watchmead
Welwyn Garden City
Hertfordshire
AL7 1LT

Call Us

+44 (0)1707 338871