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.
The new system delivers high-speed (5,700mm2/sec), high-accuracy (XY positioning of 3µm at 3?), height repeatability (below 2µm at 3?), and scalable resolutions of 7, 12 and 18µm for boards weighing 12kg. http://www.sakiglobal.com/automated-optical-i
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New Equipment | Industrial Automation
Contact: Nancy Lin Email:info@amikon.cn Skype:onlywnn_1 Telegram:+8618020776786 Mobile(Whatsapp): (+86)-18020776786 QQ :2851195456 Control Systems (DCS, PLC/SPS, CNC) - Panel Controllers - HMI and Display Panels - Industrial PC’s - Dri
Industry News | 2018-10-18 08:59:34.0
PRINCIPLE OF SURFACE MOUNT PROCESS(SMT PROCESS)
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New Equipment | Industrial Automation
Contact: Nancy Lin Email:info@amikon.cn Skype:onlywnn_1 Telegram:+8618020776786 Mobile(Whatsapp): (+86)-18020776786 QQ :2851195456 Control Systems (DCS, PLC/SPS, CNC) - Panel Controllers - HMI and Display Panels - Industrial PC’s - Dri
Used SMT Equipment | In-Circuit Testers
EMI Test Receiver The EMI Test Receivers ESHS10 and ESHS30 are double-conversion heterodyne receivers covering the frequency range from 9kHz to 30MHz. They can be manually operated, featuring high frequency resolution and accuate level indication,
Used SMT Equipment | In-Circuit Testers
EMI Test Receiver The EMI Test Receivers ESHS10 and ESHS30 are double-conversion heterodyne receivers covering the frequency range from 9kHz to 30MHz. They can be manually operated, featuring high frequency resolution and accuate level indication,
New Equipment | Industrial Automation
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Technical Library | 2020-10-18 19:35:05.0
Interconnect reliability especially in BGA solder joints and compliant pins are subjected to design parameters which are very critical to ensure product performance at pre-defined shipping condition and user environment. Plating thickness of compliant pin and damping mechanism of electronic system design are key successful factors for this purpose. In additional transportation and material handling process of a computer server system will be affected by shock under certain conditions. Many accessories devices in the server computer system tend to become loose resulting in poor contact or solder intermittent interconnect problems due to the shock load from the transportation and material handling processes.
Model 310H adapts the Mainframe 6040 to amplitude requirements of up to 800 V for 50 ohm loads. The operating capabilities of the 6040/310H provide outputs in the form of 1 ns resolution digital delays and gates and PRFs from .01 Hz to 100 kHz (or on
