Reliable filling of through vias with silver based conductive adhesives in flexible PEN substrates using low-cost optimized stencil printing methods

Systems-in-foil technologies address the current need to manufacture low-cost, low-complexity and high-reliabiltiy large area organic electronics in the field of OLEDs, OPVs and sensors. For substrates with multiple layers of conductive tracks, there is a need to realize contact positions on either side of the foil. Unfortunately, typical...

High speed bending of 2nd level interconnects on printed circuit boards for automotive electronics

Standard drop tests for portable electronics are not representative for the qualification of automotive electronics. High-frequency vibrations are more dominant than abrupt shocks during normal operation. In this work a high speed board bending (HSB) method is developed to mimic the constant cyclic solder joint loading (sinus wave load, 10-200...

Experimental and numerical study of friction and braking characteristics of rolling tires

Throughout the tire industry, virtual testing has been widely adopted in the design process. Both static deformation and dynamic response of the tire rolling on the road must be accurately predicted to evaluate the handling performance of a tire. Unfortunately, experimental characterization of rubber compound frictional properties is limited,...

Local stress analysis in devices by FIB

Intrinsic stresses in bondpads may lead to early failure of IC's. In order to determine the intrinsic stresses in semiconductor structures, a new procedure is set up. This procedure is a combined experimental/numerical approach which consists of the following steps: First, a conductive gold layer (20 nm thickness) is deposited on the power line...

Shear and anchorage behaviour of fire exposed hollow core slabs

The fire resistance of hollow core slabs is currently assessed considering flexural failure only. However, fire tests show that shear or anchorage failure can also govern the load bearing behaviour. This paper is based on the dissertation by the author1 and discusses existing and new fire tests. It also presents the development, calibration and...

A finite element lower extremity and pelvis model for predicting bone injuries due to knee bolster loading

Injuries to the knee-thigh-hip (KTH) complex in frontal motor vehicle crashes are of substantial concern because of their frequency and potential to result in long-term disability. Current frontal impact Anthropometric Test Dummies (ATDs) have been shown to respond differently than human cadavers under frontal knee impact loading and...

Numerical prediction of seating position in car seats

Two of the main design objectives for car interiors are comfort and safety. These aspects are both determined by the seating position of the occupant. Seat manufacturers use the SAE Three-Dimensional H-Point Machine™ to measure seating positions to design, audit, and benchmark seats. The seating positions measured with the H-Point Machine form...

Development of a FEM pelvis model for analysis of pressure distributions

Higher demands by people on the performance of vehicles and the comfort-related physical complaints by professional drivers have led to an increasing demand for more comfortable cars. Car manufacturers use comfort as an item to distinguish themselves from their competitors. However, the development and introduction of a new, more-comfortable car...