New Package Scheme of a 2.5-Gb/s Plastic Transceiver Module Employing Multiwall Nanotubes for Low Electromagnetic Interference

Abstract

A novel polymer-based multiwall carbon nanotube (MWCNT) with high shielding effectiveness (SE) for use in packaging a 2.5-Gb/s plastic transceiver module is demonstrated. The MWCNT composites are tested to evaluate the electromagnetic (EM) shielding against emitted radiation from the optical transceiver modules. The results show that the SE of MWCNT composite packages exhibit 38-45 dB in the far-field source and 28-40 dB in the near-field source at a frequency range of 1-3 GHz, and an average of 14 dB for the optical transceiver modules at a frequency of 2.5 GHz. The MWCNT composites with their high SE are potentially suitable for packaging low-cost and low-EMinterference optical transceiver modules used in Gigabit Ethernet or fiber-to-the-home lightwave transmission systems.

Electromagnetic Shielding Performance for a 2.5 Gb/s Plastic Transceiver Module Using Dispersive Multiwall Carbon Nanotubes

“…4 revealed that the higher weight percentage of MWCNTs exhibited to a higher electrical conductivity. The measurement results of conductivity in thin-film composites show a remarkable improvement in comparing with our previous results [17]- [18], and also comparable to Kim's results [21]- [22]. That's mainly due to the contribution from a well dispersion of MWCNTs.…”

“…The CVD produced MWCNTs are 95% pure; whereas the ADM produced MWCNTs in this experiment are not well purified before dispersion. There are a lot of impurities such as carbon nano capsules (CNC), carbonaceous impurities or ash, and amorphous carbon existed in the ADM [18]. Therefore, we need more Mica to separate the ADM produced MWCNTs to achieve the equal uniformity.…”

“…The electronic and mechanical properties of MWCNTs are remarkable [13][14] that the MWCNTs have been the focus of considerable research and development for use in nanoscale electronic and optoelectronic applications such as integrated circuit (IC) interconnections [15], optical emission devices [16], and optical transceiver modules [17][18]. MWCNTs are used as one of the electronic conductive fillers for EM shielding of plastic module package applications [15][16] because of their smaller diameter, higher aspect ratios, higher conductivity, and better mechanical properties.…”

The Electromagnetic Shielding Effectiveness of a Low-Cost and Transparent Stainless Steel Fiber/Silicone Resin Composite

“…Where R = (|S 11 | 2 ) × 100% and A = (1−|S 11 | 2 −|S 21 | 2 ) × 100% [18]. It can be seen that the R > A for all investigated concentrations, this means that reflection is a primary mechanism of the shielding, as expected for metallic materials [17].…”

“…The VLT was still above 74% when concentration was 0.75 wt.%. It is comparable or even better than many other methods [10], [17]. Because of mismatching of refractive index, light is supposed to scatter severely, causing loss of transmitted light [12].…”