Evening Seminar DarlingtonTHE INSTITUTE OF CIRCUIT TECHNOLOGY DARLINGTON EVENING SEMINAR
Supported by Merlin Flexability
The Institute of Circuit Technology are pleased to announce an Evening Seminar on Tuesday 2nd November. The Seminar is being held at the Devenport Hotel, Darlington.
http://www.devonporthotel.com/
SUPPORTING INDUSTRY NEEDS PAPERS There will be four papers , followed by a buffet. VENUE : Devonport Hotel, Darlington DATE : Tuesday 2nd November2010 TIME : 18:00 with registration at 17:30 Martin Wickham – National Physical Laboratory A Comparison of Via Reliability after Lead-Free Soldering using Thermal Cycling and Interconnection Stress Testing (20 – 25 Minutes) European legislation has meant that lead-free solders now dominate mainstream electronics manufacture. Substrate technology has been developed around reinforced resin materials and degradation at the higher process temperatures required by the new alloys is an issue. This is compounded by the conducting features being brought into closer proximity as a result of increasing technology advances driven by miniaturisation. The removal of non-functional pads to facilitate signal routing and improve drilling of high aspect ratio vias, may also affect substrate reliability. The National Physical Laboratory and PWB Interconnect Solutions Inc. have undertaken a joint study following identical test structures through thermal cycling with constant electrical monitoring (event detecting) and interconnection stress testing. The coupons included test patterns to monitor changes in interconnection pitch, processing environments and also the effect of the removal of non-functional pads.
Martyn Gaudion – Polar Instruments Controlled Impedance, Loss Simulation and Test. (20 – 25 Minutes) The presentation is a overview of designers requirements for controlled impedance and Loss simulation and the implications on the PCB manufacture, It looks at the requirement for accurate impedance simulation and the effect of materials on the finished product. Martyn will then discuss the importance of clear and concise information transfer through the supply chain to ensure that the specification for the PCB are met at all points through the process. At the End Martyn will look to the future of simulation and test and will discuss the work that we are doing to develop a test method for Loss and the requirements for the industry Martin Wickham – National Physical Laboratories Recent NPL PCB-orientated projects including detecting moisture in PCBs (20 – 25 Minutes)
The occurrence of delamination due to moisture ingression in PCBs has increased with the increasing SMT assembly process temperatures. By the time delamination is observed, there has been a considerable investment into the PCA. There is significant interest in detecting the moisture level in a PCB prior to any thermal assembly cycles. Moisture has a significant impact on electrical dielectric properties of the laminate and work at NPL has explored the relative merits of two different techniques to detect their sensitivity to absorbed moisture. The two techniques are (i) an application of time domain reflectometry (TDR), route impulse energy (RIE) measurements, and (ii) capacitance measurements. The relative merits of these approaches will be discussed. An update on current NPL projects relating to PCBs will as be given. Mark Merifield – Merlin Flex-Ability Designing Flexible Circuits to meet today's reliability, cost & lead-time demands (15 – 20 Minutes)
A fabricators view with a focus on key attributes: 1. Designing within standard capabilities v's capability limits i.e. circuit size, track/gaps, hole sizes, material selection 2. The effects on tooling and its selection srd, cartridge tool, fully hardened tools or laser cutting. A look at cost, tolerances, capabilities & limitations. 3. Designing in controlled impedance. Its effect on builds and constructions.
By request, we will issue a 'certificate of attendance', to provide an official record of participation in the event. This certificate can be used to keep professional development records up to date and also as proof of career development.
Register with: This email address is being protected from spambots. You need JavaScript enabled to view it. Bill Wilkie Technical Director Institute of Circuit Technology www.InstCT.org Tel - 01573 226131 This email address is being protected from spambots. You need JavaScript enabled to view it. |