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Total Loss: How to Qualify Circuit Boards

Image: Model of electronic supply chain, showing key exchange points for PCB laminate materials and fabricated circuit boardsTotal Loss: How to Qualify Circuit Boards

We clarify the role of signal loss measurements, aka Total Loss, in specifying and qualifying circuit board materials for high-speed electronic design. We then demonstrate the NIST Multiline measurement technique in particular by characterizing test lines fabricated in conventional PCB materials.

The paper describes and demonstrates this technique, and shows how to accurately report signal propagation loss as a function of frequency, even when using TDR-based systems. The paper also reveals how impedance mismatch and differential delay variance contribute to the reported loss for various test methods in practice today.

Read Article...

Authors:

Don DeGroot, Peter Pupalaikis, Brian Shumaker

Organization:

Connected Community Networks, Inc.

Presented at:

DesignCon 2011

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Featured auction

X-Line Electronic Equipment Auctions

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Wed, May 17 | Online Auctions | X-Line Asset Management

Surplus SMT & Test Equipment from Sanmina SCI Facility, Ottawa Canada...»»

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BEST, Inc

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A variety of solder training kits for training and certifying personnnel - lead free and tin-lead versions.

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Electronic Equipment Mart

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Vitronics 6748 Dual Pot
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Forum

Wave Solder - We are having problems with a particular board we run through our wave solder on a pallet. The board is populated with about 20 fuse clips, and one clip on almost every board gets filled with solder...

Placing Luxeon Rebel - We are having some difficulties placing the luxeon rebel LED's. It doesn't matter what nozzle's we use, we cant run our P&P machine's on full speed without the rebel's dropping on the PCB...

Flux mixed with Thinner - I received some advice 1) use Flux with Thinner 2) use Flux with Water. Which one is better for my wave sodlering?...

Visit the Forum... Have a Question? Ask for Free...

Forum

Crimping Inspection & Quality Control Webinar

Online Webinar | Mon, May 16 | Sponsored by: ASKbobwillis.com

This online session covers the use of crimp connectors, preparation of terminations and the process controls/calibration...

South East Asia Technical Conference on Electronic Assembly

Conference | Penang, Malaysia | Thu, May 19 | Sponsored by: SMTA

A two day technical conference addressing such as new materials, processes, reliability, cleaning, package on package...

IPCA-610 CIS Training

Seminar/Course | Chicago, IL, USA | Tue, May 17 | Sponsored by: BEST Inc

A 3-day course that teaches students the accept/reject criteria in the IPC-A-610, for all three classes of PCB assembly...

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Career Center

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Industry Associations Events

SMTA

SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore

Next Event: Oregon Chapter Symposium and Supplier Day - May 18


IPC

IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly. Membership Info | Training & Certification Programs | Standards & Publications - Online Store

Next Event: CALCE/IPC Joint JISSO Seminar on Advanced Interconnection Solutions - May 24-25


SMTnet Express
May 12, 2011

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