Technical Library | 2017-11-22 12:38:51.0
The use of copper foils laminated to polyimide (PI) as flexible printed circuit board precursor is a standard practice in the PCB industry. We have previously described[1] an approach to very thin copper laminates of coating uniform layers of nano copper inks and converting them into conductive foils via photonic sintering with a multibulb conveyor system, which is consistent with roll-to-roll manufacturing. The copper thickness of these foils can be augmented by electroplating. Very thin copper layers enable etching fine lines in the flexible circuit. These films must adhere tenaciously to the polyimide substrate.In this paper, we investigate the factors which improve and inhibit adhesion. It was found that the ink composition, photonic sintering conditions, substrate pretreatment, and the inclusion of layers (metal and organic) intermediate between the copper and the polyimide are important.
Technical Library | 2013-03-28 16:18:22.0
For the last couple of years, the main concerns regarding the electrical performance of blank PCB boards were impedance and ohmic resistance. Just recently, the need to reduce insertion loss came up in discussions with blank board customers (...) The paper describes the test vehicle and the testing methodology and discusses in detail the electrical performance characteristics. The influence of the independent variables on the performance characteristics is presented. Finally the thermal reliability of the boards built applying different copper foils and oxide replacements was investigated.
Technical Library | 2013-04-25 11:42:01.0
Specification and control of surface roughness of copper conductors within printed circuit boards (PCBs) are increasingly desirable in multi-GHz designs as a part of signal-integrity failure analysis on high-speed PCBs. The development of a quality-assurance method to verify the use of foils with specified roughness grade during the PCB manufacturing process is also important... First published in the 2012 IPC APEX EXPO technical conference proceedings.
Typical Applications 1.microprocessors and cache chips 2.aptop PCs and other high density, handheld portable electronics 3.high speed disk drives Features/Benefits 1.component junction temperature reduction of 20??C is typical 2.easily added t
Technical Library | 2015-04-30 20:17:03.0
Higher-speed signal transmission is increasingly required on a printed circuit board to handle massive data in electronic systems. So, signal transmission loss of copper wiring on a printed circuit board has been studied. First, total signal loss was divided into dielectric loss and conductor loss quantitatively based on electromagnetic theory. In particular, the scattering loss due to surface roughness of copper foil has been examined in detail. And the usefulness of the copper foil with low surface roughness has been demonstrated.
Industry News | 2015-06-22 13:17:54.0
Insulectro (www.insulectro.com), a leading supplier of materials for use in the PCB and printed electronics industries, announced a breakthrough partnership to supply world-class performance copper foils manufactured by Oak-Mitsui throughout North America.
Industry Directory | Manufacturer
Wellen PCB Co.,Ltd is a high technology PCB manufacturer in China Our products include: Multilayer PCB,Metal based PCB,Hi-Tg heavy copper foil PCB,Flat winding multilayer PCB,DHI PCB and so on
Paramount Enterprises with a renowned brand PARENTNashik is an ISO 9001:2015 certified company, listed in major leading manufacturers, suppliers & exporters of resistance spot welding consumables, spares, weldparts in Nashik – India. PARENTNashik is
Tachyon-100G laminate materials are designed for very high-speed digital applications up to and beyond speeds of 100 Gb/s. Tachyon 100-G materials exhibit exceptional electrical properties that are very stable over a broad frequency and temperature
The phasor range of machines uses a different illumination and imaging technique and is designed for use with low contrast materials such as RTF, DSTF or double treated copper foils. phasor systems use the florescent properties of the pcb laminate to