Technical Library | 2019-02-13 13:45:11.0
Development of information and telecommunications network is outstanding in recent years, and it is required for the related equipment such as communication base stations, servers and routers, to process huge amount of data in no time. As an electrical signal becomes faster and faster, how to prevent signal delay by transmission loss is a big issue for Printed Circuit Boards (PCB) loaded on such equipments. There are two main factors as the cause of transmission loss; dielectric loss and conductor loss. To decrease the dielectric loss, materials having low dielectric constant and low loss tangent have been developed. On the other hand, reducing the surface roughness of the copper foil itself to be used or minimizing the surface roughness by modifying surface treatment process of the conductor patterns before lamination is considered to be effective in order to decrease the conductor loss. However, there is a possibility that reduction in the surface roughness of the conductor patterns will lead to the decrease in adhesion of conductor patterns to dielectric resin and result in the deterioration of reliability of PCB itself. In this paper, we will show the evaluation results of adhesion performance and electrical properties using certain type of dielectric material for high frequency PCB, several types of copper foil and several surface treatment processes of the conductor patterns. Moreover, we will indicate a technique from the aspect of surface treatment process in order to ensure reliability and, at the same time, to prevent signal delay at the signal frequency over 20 GHz.
Used SMT Equipment | General Purpose Test & Measurement
Agilent-Keysight 81110A-81112A (x2) Pulse / Pattern Generator with 165 / 330 MHz Pulse / Pattern Generator Output Module The Agilent 81110A with one or two Agilent 81111A output modules is a single/dual-channel 165 MHz Pulse Pattern Generator.
Used SMT Equipment | Adhesive Dispensers
Manufactured in 2005 Pass-through conveyor, chain type Single head: SC-200 slim swirl applicator Tri-Mode Swirl Box - dispenses conformal coating materials in a bead, monofilament, or swirl pattern.
Industry Directory | Manufacturer
Orbotech develops and produces the world's most advanced hi-tech equipment for inspecting and imaging circuit boards and display panels - the backbones of today's cutting-edge electronic products.
Industry Directory | Equipment Dealer / Broker / Auctions
Used Equipment Specialist, Singapore-Malaysia-China
BEST has a variety of standard circuit frame patterns. We also can cross-reference competitive patterns and fabricate custom patterns without very large minimum orders. Call for help in picking the right circuit frame. These are ALL ROHS compliant. A
http://www.my-smt-spider.com/ Essemtec Spider, the extreme fast and compact jet and general dispenser is rated for up to 150'000 dots per hour, dispenses 3D patterns and much more. -Small footprint of only 1sqm -Easily adaptive for your ap
With the development of miniaturization of assembly components, the layout area and pattern design area of PCBs have also been continuously reduced, and PCB manufacturers are constantly updating the production process to conform to the development tr
Accept a device and either plug into an EPROM emulator or production socket or solder down to a land pattern. Available for DIP, PLCC, SOIC and QFP packages.
Plug into a DIP socket and provide a land pattern for soldering down an SOIC or SSOP device. Use to replace unavailable packages.
