Quinone-based-molecule-doped poly(methyl methacrylate) photopolymer for holographic data storage

2002 ◽  
Author(s):  
Shiuan-Huei Lin ◽  
Ken Y. Hsu
Keyword(s):  
Methyl Methacrylate ◽  
Data Storage ◽  
Holographic Data Storage ◽  
Poly Methyl Methacrylate

scholarly journals DOPED POLY(METHYL METHACRYLATE) PHOTOPOLYMERS FOR HOLOGRAPHIC DATA STORAGE

2006 ◽  
Vol 15 (02) ◽  
pp. 239-252 ◽  
Author(s):  
SHIUAN HUEI LIN ◽  
JUNE-HUA LIN ◽  
PO-LIN CHEN ◽  
YI-NAN SHIAO ◽  
KEN Y. HSU
Keyword(s):  
Methyl Methacrylate ◽  
Data Storage ◽  
Physical Mechanism ◽  
Dynamic Range ◽  
Optical Quality ◽  
Holographic Recording ◽  
Holographic Data Storage ◽  
Poly Methyl Methacrylate ◽  
Recording Material ◽  
Good Optical Quality

In this paper, we report our investigations on thick holographic recording material of the phenanthrenequinone doped poly(methyl methacrylate) (PQ:PMMA) photopolymer. The design strategy and fabrication technique for making thick polymer samples with negligible shrinkage and good optical quality are presented. The physical mechanism for holographic recording in PQ:PMMA material is described, and methods for improving are proposed. Based on these methods, photopolymer samples with different compositions are fabricated and experimentally characterized. The results show that by modifying compositions, the material sensitivity and dynamic range for volume holographic recording have been improved.

scholarly journals PREPARATION OF MESOSCOPIC STRUCTURE POLY METHYL METHACRYLATE THIN FILMS FOR AFM DATA STORAGE DEVICES.

2019 ◽  
Vol 2 (1) ◽  
pp. 1-3
Author(s):  
Chandar Shekar B ◽  
Sathisha S ◽  
Sulana Sundari ◽  
Sunnitha S ◽  
Sharmila C
Keyword(s):  
Thin Films ◽  
Methyl Methacrylate ◽  
Data Storage ◽  
Dip Coating ◽  
Magnetic Data ◽  
Promising Alternative ◽  
Poly Methyl Methacrylate ◽  
Mesoscopic Structure ◽  
Coating Method ◽  
Dip Coating Method

Poly methyl methacrylate (PMMA) thin films were prepared by dip coating method. Benzene was used as a solvent to prepare PMMA thin films for the time periods ranging from 1 min. to 1 h. The thickness of the films deposited was measured by using an electronic thickness measuring instrument (Tesatronic-TTD-20). Fourier Transform Infrared spectrum was used to identify the above said films. X-ray diffraction spectra indicated the predominantly amorphous nature of the films. Surface morphology of the coated films studied by using scanning electron microscope (SEM) indicated the absence of any pits, cracks and pin holes in the surface. Both as grown and annealed films showed smooth and amorphous structures. The closer SEM inspection revealed the presence of self assembled mesoscopic cells. The mesoscopic structure PMMA thin films could be used as an AFM-based data storage which is promising alternative to conventional magnetic data storage because it offers great potential for considerable storage density improvements.

Thermal Conductivity Measurements of Ultra-Thin Amorphous Poly(Methyl Methacrylate) (PMMA) Films

2013 ◽  
Author(s):  
Ickchan Kim ◽  
Mihai G. Burzo ◽  
Pavel L. Komarov ◽  
Peter E. Raad
Keyword(s):  
Thin Film ◽  
Thermal Conductivity ◽  
Methyl Methacrylate ◽  
Data Storage ◽  
Thermophysical Properties ◽  
Dielectric Materials ◽  
Magnetic Data ◽  
Poly Methyl Methacrylate ◽  
Wide Range ◽  
Intrinsic Thermal Conductivity

As technology progresses towards smaller and higher density microelectronic devices, we are faced with working with atomic-scale dimensions that present us with challenges but also opportunities. Since mechanical and chemical properties of ultra-thin polymeric films can vary dramatically from their bulk, the thermophysical properties of thin films are also expected to vary. Ultra-thin poly(methyl methacrylate) (PMMA) films have been the focus of numerous investigations in recent years as a data storage medium. Employing Atomic Force Microscopy (AFM) technology, it is possible to store data bits by heating a target zone until it melts, which leaves a nano-dimple indentation in the PMMA polymer film. The AFM technology has great potential because it possesses considerable data density when compared to conventional magnetic data storage. Since the amount of heat that needs to be used to melt the nanoscale region of the polymer needs to be precisely controlled, knowing the thermophysical properties of such films is a critical factor in advancing this technology. It is known that heat carriers such as electrons and phonons in metallic and dielectric materials, respectively, are influenced by the “size effect” in the micro and nano-scale dimensions. Therefore, a goal for this investigation is to determine whether any dependence exists between the PMMA’s film thickness and its thermal conductivity. In this work we investigated whether a “scale effect” on intrinsic thermal conductivity actually exists for amorphous PMMA films with thicknesses ranging from 40 nm to 2 μm. The approach is based on the transient thermoreflectance (TTR) method, where the change in the surface temperature is measured by detecting the change in the reflectivity of the sample. The sample is heated by laser irradiation and probed using a continuous-wave laser that detects changes in the reflectivity of the heated material surface. The experimentally obtained transient temperature signature is then used to extract unknown values of thermal properties. Based on our previous experience with measuring a wide range of thin-film materials and the data available in the literature, we expected a lower thin-film thermal conductivity as compared to the bulk value. Surprisingly, the results show that the intrinsic thermal conductivity of layers thinner than 40 nm PMMA film deposited on native silicon oxide is about three times higher than the bulk PMMA value. A similar trend was observed for all ultra-thin (sub 100 nm) films.

Novel Azo Dye-Doped Poly(Methyl Methacrylate) Films as Optical Data Storage Media

1997 ◽  
Vol 36 (Part 1, No. 1B) ◽  
pp. 429-438 ◽  
Author(s):  
Vinh Phuc Pham ◽  
Tigran Galstyan ◽  
André Granger ◽  
Roger A. Lessard
Keyword(s):  
Methyl Methacrylate ◽  
Data Storage ◽  
Azo Dye ◽  
Optical Data Storage ◽  
Optical Data ◽  
Poly Methyl Methacrylate ◽  
Storage Media
Sign in / Sign up

Export Citation Format

Share Document