Pressure Sensitive Tapes – Page 4

Paper making

Paper making can be trace back long time ago. I did notice there is a saying that Egyptians first invented paper; however based on the education I received, it is a Chinese named Cai Lun who invented paper at the time around 100 AD. Anyway, modern paper making is much more complicated and different from these ancient process. The following is a short history of paper making.

OCA formulation

Due to better refractive index matching between optical film and OCA, optically clear adhesive, compared to only air gap, OCA dramatically enhances display performances; there it have been broadly applied in the displays, solar cells, automobiles, buildings, et. al. In addition to provide suitable adhesion, it is also required to be optically transparent, colorless, weathering/aging resistant (no yellowing, no bubbles), and sometimes it requires to able to sustain high temperature, dissipate stress and more as required by specific applications.

Wafer dicing and grinding

Some nice videos from DISCO company website. Always good to understand the process in order to select or recommend most suitable materials for the best results.

UV release tape

In the semiconductor processing, e.g. dicing, grinding, wafers or similar objects need to be held with enough adhesion; after the process completed, the finished parts need to be peeled off easily from the holder. UV release tapes (UVR) are quite suitable for such applications.

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).

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%.

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”

Silicone release agent chemistry

Silicone release Agent related chemistry Continue reading “Silicone release agent chemistry”