Fabrication of 2-inch free standing porous GaN crystal film and application in the growth of relaxed crack-free thick GaN

CrystEngComm ◽  
2021 ◽  
Author(s):  
lei liu ◽  
Ruixian Yu ◽  
Guodong Wang ◽  
Mingsheng Xu ◽  
Shouzhi Wang ◽  
...  
Keyword(s):  
Free Standing ◽  
Crystal Film ◽  
Gan Crystal

Porous template has the function of relieving the stress of epitaxially grown GaN crystals and blocking dislocations. In this study, a 2-inch self-standing porous GaN crystal film was fabricated for...

Laser-induced buckling of a thin free-standing crystal film

1985 ◽  
Vol 24 (22) ◽  
pp. 3685 ◽  
Author(s):  
Noel A. Clark ◽  
Phillip W. Young ◽  
James F. Scott
Keyword(s):  
Free Standing ◽  
Crystal Film

scholarly journals Self similarity of liquid droplet coalescence in a quasi-2D free-standing liquid-crystal film

Soft Matter ◽  
2020 ◽  
Vol 16 (19) ◽  
pp. 4607-4614
Author(s):  
Christoph Klopp ◽  
Torsten Trittel ◽  
Ralf Stannarius
Keyword(s):  
Liquid Crystal ◽  
Liquid Droplet ◽  
Self Similarity ◽  
Droplet Coalescence ◽  
Free Standing ◽  
Crystal Film ◽  
Self Similar

Flat droplets coalescing on smectic free-standing films show self-similar dynamics.

Electrooptic Behavior of Free-Standing Ferroelectric Liquid Crystal Film

1996 ◽  
Vol 35 (Part 2, No. 2A) ◽  
pp. L158-L160 ◽  
Author(s):  
Sadahito Uto ◽  
Hideyo Ohtsuki ◽  
Motokazu Terayama ◽  
Masanori Ozaki
Keyword(s):  
Liquid Crystal ◽  
Ferroelectric Liquid Crystal ◽  
Free Standing ◽  
Crystal Film

Stability of a free-standing liquid-crystal film: The measurement of the interaction between the film surfaces

2007 ◽  
Vol 105 (3) ◽  
pp. 665-672 ◽  
Author(s):  
P. V. Dolganov ◽  
H. T. Nguyen ◽  
G. Joly ◽  
E. I. Kats ◽  
V. K. Dolganov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Free Standing ◽  
Crystal Film

scholarly journals Dynamic response of electro‐optic effect in free‐standing ferroelectric liquid crystal film

1996 ◽  
Vol 69 (11) ◽  
pp. 1503-1505 ◽  
Author(s):  
Sadahito Uto ◽  
Hideyo Ohtsuki ◽  
Masanori Ozaki ◽  
Katsumi Yoshino
Keyword(s):  
Liquid Crystal ◽  
Dynamic Response ◽  
Ferroelectric Liquid Crystal ◽  
Free Standing ◽  
Crystal Film ◽  
Electro Optic

Free-standing Diamond Single Crystal Film for Electronics Applications

2005 ◽  
Vol 905 ◽  
Author(s):  
Jie Yang ◽  
Weixiao Huang ◽  
T. P. Chow ◽  
James E. Butler
Keyword(s):  
Single Crystal ◽  
Schottky Barrier ◽  
Chemical Properties ◽  
Structural Quality ◽  
Schottky Barrier Diodes ◽  
Free Standing ◽  
Crystal Film ◽  
Single Crystal Diamond ◽  
Transparent Semiconductor ◽  
Radiation Conditions

AbstractHigh quality single crystal diamond film is an excellent transparent semiconductor material. Combined with its good electrical, optical, thermal and chemical properties, diamond-based semiconductor devices offer the potential of operation at very high voltages (>10 kV), power levels, and temperatures (>400°C) and under extreme radiation conditions.In this paper, we exploit the optical transparent property of MPCVD single crystal diamond films to correlate the quality of the epi-layers with the performance of Schottky barrier diodes fabricated on the layer. We used optical microscopy to observe stress induced birefringence caused by defects/dislocations in the material and micro- Raman/photoluminescence to detect relative amounts of non-diamond carbon and color centers (nitrogen and silicon atom complexes with lattice vacancies) in the material. High structural quality (low stress) is correlated with the properties of Schottky barrier diodes fabricated in the material. Vertical devices made from a 20 µm homo-epi-layer have been shown high breakdown fields of 1.85 MVcm-1 (BV = 3.7 kV) and conduction of 0.6 A/cm2 at 20V forward drop at 290 °C. Through device failure analysis, we can conclude that the 1.85 MVcm-1 field is only a lower limit for the material. Local stresses (dislocations) and point defects appear to be the main reasons for the high voltage failure of our single crystal diamond rectifiers.

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