FR4 Density

Conduct Research

• Simulation and Measurement of High Speed Serial Link Performance in a Dense, Thin Core Flip Chip Package
  , like Hyper Transport, Infiniband, PCI Express, RapidIO and SATA, are driving new speed and density specifications for differential signals. This paper will show how to meet these product requirements with a thin core, flip chip, organic package which uses a standard, reasonable-cost, reliable FR-4...
• Soldering Recommendations for Surface Mount and Multilayer Metal Oxide Varistors (.pdf)
  . device and PCB. Currently for most applications, both the. MULTILAYER TRANSIENT VOLTAGE. CH and ML series use FR4 boards without issue. SUPPRESSOR. A further advantage of this type of construction is that the. Fluxes. breakdown voltage of the device is dependent on the. Fluxes are used...
• Stronger and Lighter -- Composites Make Their Mark
  epoxy composites of printedcircuit boards, leading to their use in laptop computers. Carbon-epoxy composites are being used to reduce the CTE of E-glass-reinforced printed-circuit board (PCB) materials such as FR-4. Their use reduces thermal stresses and warping, which are key modes of failure...
• Thermal Considerations For DC/DC Converters
  is assembled on a FR-4. heat flow circuit is presented. Voltage sources are replaced. PCB and is potted with a thermally conductive material in a. by temperature sources and the DC current is the heat flow. metallic case. Figure 2 shows a converter with the same. It should be pointed out that the heat...
• Laser Marking Fundamentals (.pdf)
  . Excellent. Glass. Poor. PC Board. Metals. Bare. Good. Aluminum. Coated fiber. Good. Anodized. Excellent. Fiber substrate (FR4). Poor. Bare. Good. Painted. Excellent. Plastics. Copper. ABS. Excellent. Brass (bare). Good. Acrylic. Good. Copper (bare). Good. Epoxy. Good. Copper (nickel coated). Good...
• PTFE And Hybrid Multilayer Bonding And Fabrication
  , low loss sheet adhesive or bonding film. The other is a hybrid or composite multilayer consisting of a layer (or layers) of PTFE and a layer (or layers) of a different material typically FR-4 bonded with a thermosetting prepeg. Material Selection. The first part of the process is the selection...
• Sensors take the heat
  reduces the effect of heat upon their operation. Some harsh-environment electronics research focuses on the materials and methods used to build electronic circuits such as the use of the organic PCB material known as FR-4 with components attached by solder. Circuits built using this method limit...
• Backplane Design Commands a Critical Role in New Open Specifications For High Performance Systems
  the negative effects of the SMA contacts and cables would be eliminated. Measurements and tests both indicate that FR-4 can support speeds of over 5 Gbps with the AdvancedTCA layout. Not all layouts are as generous; the new VXS architecture presented a substantially different challenge -- retaining...
• Technology Overview: VITA 41 (VXS)
  was performed on a physical. backplane, with acceptable signal performance found at the rated. speeds. Specific test conditions documented by VITA were: 16". Figure 1. VXS Payload Card. FR4 backplane traces, 4" FR4 daughtercard traces, top layer via. A VXS switch card, a new design, is architected...
• Proper Stack-Up in a Multilayer PCB to Reduce Noise Coupling and Improve EMI
  two-port. subtract useful area to the PWR/. t. calibration has been made at the ends. = 2.088 mm and the dimensions are. GND plane pair, therefore increasing. 260 × 210 mm; the dielectric material. of the probes. the S. is standard FR-4 with nominal relative. A full wave field solver CST STU-. 21. Figure...

Engineering Web Search: FR4 Density