A new laminate material for high performance PCBs: liquid crystal polymer copper clad films

2002 ◽  
Author(s):  
E.C. Culbertson
Keyword(s):  
Liquid Crystal ◽  
High Performance ◽  
Liquid Crystal Polymer ◽  
Laminate Material ◽  
Crystal Polymer

High Performance High Density Interconnects using Liquid Crystal Polymer-Substrates, Circuits Driven by Mobile Applications

2015 ◽  
Vol 2015 (1) ◽  
pp. 000817-000821
Author(s):  
James Rathburn
Keyword(s):  
Liquid Crystal ◽  
High Speed ◽  
High Performance ◽  
Impedance Matching ◽  
Liquid Crystal Polymer ◽  
High Density ◽  
Development Effort ◽  
Crystal Polymer ◽  
Manufacturing Applications ◽  
Small Form Factor

The goal of the development effort was to prove a new way of creating electrical interconnects that enable much higher density, tuned circuits and connectors driven by the demands of future mobile and computing applications, including wearable and connected devices. The primary results obtained are a method to fabricate package substrates, small form factor rigid and flexible circuits using a material used in the connector industry Liquid Crystal Polymer, and linking circuits and connectors with tuned high density performance not possible with legacy manufacturing. Applications will be detailed in conjunction with the Semiconductor companies that demonstrate substrates and circuits that have high aspect ratio traces with 20–50 micron traces surrounded with fusion bonded LCP that enables impedance matching of 1–2% on high density. The study extends further to connector technology that enables interconnect of the subject substrate or circuit directly into mobile and wearable applications with over 1000 high speed interconnects capable of 28–56 Gb/s performance within a 1/2 inch square area. In addition the study will leverage the formable nature of circuit bearing Liquid Crystal Polymer to create interconnected assemblies with integral antennae, decoupling, RF shielding and die to die interconnect ideal for wearable applications.

Fabrication of slanted liquid crystal/polymer volume grating applied to augmented reality

2020 ◽  
Vol 35 (10) ◽  
pp. 1012-1018
Author(s):  
Ming-huan LIU ◽  
◽  
Xiu-hua FU ◽  
Fei WANG ◽  
Jian TANG ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Augmented Reality ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer ◽  
Polymer Volume

An electrically light-transmittance-switchable film with a low driving voltage based on liquid crystal/polymer composites

2019 ◽  
Vol 47 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Chunxin Li ◽  
Mei Chen ◽  
Lanying Zhang ◽  
Wenbo Shen ◽  
Xiao Liang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Composites ◽  
Liquid Crystal Polymer ◽  
Light Transmittance ◽  
Driving Voltage ◽  
Crystal Polymer

A compact low frequency dual band liquid crystal polymer antenna for VHF and UHF band applications

2021 ◽  
Vol 42 ◽  
pp. 1356-1360
Author(s):  
Gandu Srilekha ◽  
P. Pardhasaradhi ◽  
B.T.P. Madhav ◽  
M. VenkateswaraRao ◽  
M.C. Rao
Keyword(s):  
Liquid Crystal ◽  
Low Frequency ◽  
Liquid Crystal Polymer ◽  
Dual Band ◽  
Crystal Polymer ◽  
Uhf Band

scholarly journals Enhancing the Optical Efficiency of Near-Eye Displays with Liquid Crystal Optics

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 107
Author(s):  
Tao Zhan ◽  
En-Lin Hsiang ◽  
Kun Li ◽  
Shin-Tson Wu
Keyword(s):  
Virtual Reality ◽  
Liquid Crystal ◽  
High Efficiency ◽  
Berry Phase ◽  
Optical Element ◽  
Liquid Crystal Polymer ◽  
Proof Of Concept ◽  
Optical Efficiency ◽  
Crystal Polymer ◽  
Light Efficiency

We demonstrate a light efficient virtual reality (VR) near-eye display (NED) design based on a directional display panel and a diffractive deflection film (DDF). The DDF was essentially a high-efficiency Pancharatnam-Berry phase optical element made of liquid crystal polymer. The essence of this design is directing most of the display light into the eyebox. The proposed method is applicable for both catadioptric and dioptric VR lenses. A proof-of-concept experiment was conducted with off-the-shelf optical parts, where the light efficiency was enhanced by more than 2 times.

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