Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Titanate thin films becoming a reality with crystal ion slicing

08.07.2003


Technical insights’ advanced coatings and surface technology alert

The recently developed method of crystal ion slicing (CIS) is rapidly gathering interest and attention as a novel way of successfully obtaining single-crystal thin films.

The excellent opto-electrical properties of barium titanate, BaTiO3, make this ferroelectric crystal eminently suitable for applications such as capacitors, pyroelectric detectors, and nonlinear optics. These films possess high dielectric constants and large pyroelectric and nonlinear coefficients.



However, many potential applications for barium titanate require a thin-film form rather than a bulk crystal. Despite substantial advances in deposition technologies for barium titanate thin films, researchers have faced continued difficulty in obtaining high-quality, single-crystal thin films, since they require lattice matching to the growth substrate. CIS looks set to offer researchers a solution to these problems.

"The CIS technique enables one to slice a 0.5 micrometers to 10 micrometers-thick layer of material from a bulk single-crystal wafer by implanting the wafer with high-energy ions and subsequent thermal treatment or wet etching of the buried sacrificial implant-damaged layer," says Technical Insight Industry Manager Girish Solanki.

Essentially, this technique uses ion implantation to modify the chemical and physical properties of materials and obtain mesoscopically thin, single-crystal films.

Post ion slicing, researchers used sophisticated analytical tools such as atomic force microscopy (AFM) to examine the samples’ surface roughness and domain structure. They observed a change in the wafers’ domain structure from single to multidomain as well as a periodic structure in the surface topography.

Using a near-field scanning microwave microscope (NSMM), researchers also noted that the barium titanate film retained the permittivity of the bulk crystal and exhibited low dielectric loss; they attributed the latter to stress induced by residual implanted ions and a thermal expansion mismatch between the substrate and the film.

Observing the large permittivity of the sliced barium titanate films, researchers concluded that it was possible to fabricate a small-sized, large-capacitance, integrated capacitor on CIS single-crystal films.

Commenting on the future of barium titanate, Solanki says, "As far as practical areas of application are concerned, the heterogeneous integration of the material makes it possible to realize multi-functional microwave and optical devices. Barium titanate is also a promising material for memory applications."


###
New analysis by Technical Insights, a business unit of Frost & Sullivan (http://www.Technical-Insights.frost.com), featured in the Advanced Coatings and Surface Technology, examines the potential of a new technology – crystal ion slicing – to produce single-crystal thin films and discusses critical research work being undertaken in this area.

Frost & Sullivan is a global leader in strategic growth consulting. Acquired by Frost & Sullivan, Technical Insights is an international technology analysis business that produces a variety of technical news alerts, newsletters, and reports. This ongoing growth opportunity analysis of advanced coatings and surface technology is covered in Advanced Coatings and Surface Technology Alert, a Technical Insights subscription service, and in Supertough Coatings, a Frost & Sullivan Technical Insights technology report. Technical Insights and Frost & Sullivan also offer custom growth consulting to a variety of national and international companies. Executive summaries and interviews are available to the press.

Advanced Coatings and Surface Technology Alert

Contact:

USA:
Julia Paulson
P: 210-247-3870
F: 210-348-1003
E: jpaulson@frost.com

APAC:
Pramila Gurtoo
DID : 603-6204-5811
Gen : 603-6204-5800
Fax : 603-6201-7402
E: pgurtoo@frost.com

Julia Paulson | EurekAlert!
Further information:
http://www.ti.frost.com/
http://www.frost.com
http://www.technicalinsights.frost.com

More articles from Materials Sciences:

nachricht Lowering the Heat Makes New Materials Possible While Saving Energy
26.09.2016 | Penn State Materials Research Institute

nachricht Scientists Find Twisting 3-D Raceway for Electrons in Nanoscale Crystal Slices
26.09.2016 | Lawrence Berkeley National Laboratory

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: OLED microdisplays in data glasses for improved human-machine interaction

The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.

“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...

Im Focus: Artificial Intelligence Helps in the Discovery of New Materials

With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.

Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...

Im Focus: Complex hardmetal tools out of the 3D printer

For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.

Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...

Im Focus: Launch of New Industry Working Group for Process Control in Laser Material Processing

At AKL’16, the International Laser Technology Congress held in May this year, interest in the topic of process control was greater than expected. Appropriately, the event was also used to launch the Industry Working Group for Process Control in Laser Material Processing. The group provides a forum for representatives from industry and research to initiate pre-competitive projects and discuss issues such as standards, potential cost savings and feasibility.

In the age of industry 4.0, laser technology is firmly established within manufacturing. A wide variety of laser techniques – from USP ablation and additive...

Im Focus: New laser joining technologies at ‘K 2016’ trade fair

Every three years, the plastics industry gathers at K, the international trade fair for plastics and rubber in Düsseldorf. The Fraunhofer Institute for Laser Technology ILT will also be attending again and presenting many innovative technologies, such as for joining plastics and metals using ultrashort pulse lasers. From October 19 to 26, you can find the Fraunhofer ILT at the joint Fraunhofer booth SC01 in Hall 7.

K is the world’s largest trade fair for the plastics and rubber industry. As in previous years, the organizers are expecting 3,000 exhibitors and more than...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Experts from industry and academia discuss the future mobile telecommunications standard 5G

23.09.2016 | Event News

ICPE in Graz for the seventh time

20.09.2016 | Event News

Using mathematical models to understand our brain

16.09.2016 | Event News

 
Latest News

Stronger turbine blades with molybdenum silicides

26.09.2016 | Materials Sciences

Scientists Find Twisting 3-D Raceway for Electrons in Nanoscale Crystal Slices

26.09.2016 | Materials Sciences

Lowering the Heat Makes New Materials Possible While Saving Energy

26.09.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>