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EMI and Absorbers

With the increasing density of electronic components in consumer electrics or any other devices, electromagnetic interference become an increasing challenge that designers and engineers have to face. In the materials level, EMI or absorbers are great tools to tackle this problem.

Embedded Thin Film Resistor

Since Embedded Thin film resistors or ETFR can shorten the transmission distance, reduce electromagnetic interference, decrease the installation cost, save the space of the circuit board, it has been broadly adopted in printed wiring board (PWB)

Calendared Copper foil Vs Electrolytic Copper foil

The following is a short comparison between Calendared (also called RA copper foil) and Electrolytic copper foil (ED copper foil).

Super cooling technology: VC & graphene

There are two ways to combine Vapor Chamber and Graphene and deliver super cooling effects:

Heat Pipes & Vapor Chambers

Due to limited space in consumer electronics, traditional heat sinks and fans become irrelevant anymore. Besides, thin film graphite sheets, from 20-100um thick, gradually phase out as well due to limited thermal dissipation capability and weak mechanic performances, particularly poor layer to layer cohesion. Meanwhile slim heat pipes and vapor chambers are taking the momentum.

Dielectric Constant Measurement

Dielectric Measurement from www.materean.com

The definition of terms related to dielectric constant can be shown in the following picture.

Cast Vs Calendar PVC

PVC is one of the important plastic films adopted for the carrier of PSA tapes. It can be made by two major process: Cast and Calendar.

SiO2

Introduction*

Nano-silica particles according to their structure are divided into two types: P-type (Porous particles ) and S-type (Spherical particles). P-type nano-silica surface contains a number of nano-porous with the pore rate of 0.611ml /g; therefore, P-type has much larger SSA comparing to S-type. S-type’s SSA is ~170-200m²/g. Further more, P-type ultraviolet reflectivity is >85% , S-type: >75%.

Vacuum coating related suppliers

Vacuum coating related materials/component/equipment Suppliers, particularly in SF Bay Area: Continue reading “Vacuum coating related suppliers”

Thermal Release Tape

Thermal Release tape or thermal debonding tape is a special functional tape which functions as a regular tape sticking to a substrate or bonding two surfaces together under certain temperature, T(stable); however it debonds at another temperature, typically higher temperature (e.g. 15C higher T(debond)), as shown in Figure 1. Continue reading “Thermal Release Tape”