An Evaluation Method of Brownian Noise in Highly Sensitive Capacitive Sensors

Fingerprint sensor had a long history. With the mobile electronics security application being ushered in several years back, miniature and low-cost capacitive fingerprint sensors enjoyed an explosion growth. One technology to make such a low-cost, highly sensitive, high environment tolerating and reliable technology is to use organic substrate to construct sensing element. In this paper, several technologies are reviewed. They include Si based absolute capacitive sensors, film-based transcapacitive technology, organic substrate-based transcapacitive technology. To make highly sensitive substrate sensor, a newly invented architecture has been achieved with new photosensitive material in combination with traditional substrate manufacturing process, resulting the best performance at very low cost. Detailed manufacturing process and performance evaluation results will be presented.

Download Full-text

Polymeric foams for flexible and highly sensitive low-pressure capacitive sensors

npj Flexible Electronics ◽

10.1038/s41528-019-0052-6 ◽

2019 ◽

Vol 3 (1) ◽

Cited By ~ 31

Author(s):

Mickaël Pruvost ◽

Wilbert J. Smit ◽

Cécile Monteux ◽

Philippe Poulin ◽

Annie Colin

Keyword(s):

Low Pressure ◽

Capacitive Sensors ◽

Polymeric Foams ◽

Highly Sensitive

Download Full-text

A highly sensitive evaluation method for the determination of different current conduction mechanisms through dielectric layers

Journal of Applied Physics ◽

10.1063/1.3631088 ◽

2011 ◽

Vol 110 (5) ◽

pp. 054104 ◽

Cited By ~ 8

Author(s):

Katsuhisa Murakami ◽

Mathias Rommel ◽

Vasil Yanev ◽

Tobias Erlbacher ◽

Anton J. Bauer ◽

...

Keyword(s):

Evaluation Method ◽

Dielectric Layers ◽

Conduction Mechanisms ◽

Highly Sensitive ◽

Current Conduction

Download Full-text

Ovarian Dysfunction in Fetally Irradiated Beagles

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100080717 ◽

1977 ◽

Vol 35 ◽

pp. 658-659

Author(s):

T. M. Seed ◽

M. H. Sanderson ◽

D. L. Gutzeit ◽

T. E. Fritz ◽

D. V. Tolle ◽

...

Keyword(s):

Gamma Rays ◽

Low Dose ◽

Long Term Effects ◽

Ovarian Dysfunction ◽

Dose Rates ◽

Highly Sensitive ◽

Microscopic Evaluation ◽

Ovarian Pathology ◽

Normal Offspring

The developing mammalian fetus is thought to be highly sensitive to ionizing radiation. However, dose, dose-rate relationships are not well established, especially the long term effects of protracted, low-dose exposure. A previous report (1) has indicated that bred beagle bitches exposed to daily doses of 5 to 35 R 60Co gamma rays throughout gestation can produce viable, seemingly normal offspring. Puppies irradiated in utero are distinguishable from controls only by their smaller size, dental abnormalities, and, in adulthood, by their inability to bear young.We report here our preliminary microscopic evaluation of ovarian pathology in young pups continuously irradiated throughout gestation at daily (22 h/day) dose rates of either 0.4, 1.0, 2.5, or 5.0 R/day of gamma rays from an attenuated 60Co source. Pups from non-irradiated bitches served as controls. Experimental animals were evaluated clinically and hematologically (control + 5.0 R/day pups) at regular intervals.

Download Full-text

Fluorescence ratio imaging of dynamic intracellular ionic signals

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100102298 ◽

1988 ◽

Vol 46 ◽

pp. 42-43

Author(s):

R. Y. Tsien ◽

A. Minta ◽

M. Poenie ◽

J.P.Y. Kao ◽

A. Harootunian

Keyword(s):

Binding Sites ◽

Living Cells ◽

Molecular Engineering ◽

Ph Indicators ◽

Highly Sensitive ◽

Fluorescence Ratio Imaging ◽

Ratio Imaging ◽

Technical Advances ◽

Indicator Dyes ◽

Fluorescein Dyes

Recent technical advances now enable the continuous imaging of important ionic signals inside individual living cells with micron spatial resolution and subsecond time resolution. This methodology relies on the molecular engineering of indicator dyes whose fluorescence is strong and highly sensitive to ions such as Ca2+, H+, or Na+, or Mg2+. The Ca2+ indicators, exemplified by fura-2 and indo-1, derive their high affinity (Kd near 200 nM) and selectivity for Ca2+ to a versatile tetracarboxylate binding site3 modeled on and isosteric with the well known chelator EGTA. The most commonly used pH indicators are fluorescein dyes (such as BCECF) modified to adjust their pKa's and improve their retention inside cells. Na+ indicators are crown ethers with cavity sizes chosen to select Na+ over K+: Mg2+ indicators use tricarboxylate binding sites truncated from those of the Ca2+ chelators, resulting in a more compact arrangement of carboxylates to suit the smaller ion.

Download Full-text

Various technic for the measurement of step thickness on crystal surfaces

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100109331 ◽

1978 ◽

Vol 36 (1) ◽

pp. 438-439

Author(s):

C. Boulesteix ◽

C. Colliex ◽

C. Mory ◽

B. Pardo ◽

D. Renard

Keyword(s):

Critical Thickness ◽

Symmetric Case ◽

Transmitted Intensity ◽

Crystal Surfaces ◽

Bright Field ◽

Excited Wave ◽

Highly Sensitive ◽

Contrast Mechanisms ◽

Step Thickness ◽

Thickness Variations

Contrast mechanisms, which are responsible of the various types of image formation, are generally thickness dependant. In the following, two imaging modes in the 100 kV CTEM are described : they are highly sensitive to thickness variations and can be used for quantitative estimations of step heights.Detailed calculations (1) of the bright-field intensity have been carried out in the 3 (or 2N+l)-beam symmetric case. They show that in given conditions, the two important symmetric Bloch waves interfere most strongly at a critical thickness for which they have equal emergent amplitudes (the more excited wave at the entrance surface is also the more absorbed). The transmitted intensity I for a Nd2O3 specimen has been calculated as a function of thickness t. The capacity of the method to detect a step and measure its height can be more clearly deduced from a plot of dl/Idt as shown in fig. 1.

Download Full-text

Evaluation method for imaging plate resolution by means of phase contrast transfer function

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100139688 ◽

1995 ◽

Vol 53 ◽

pp. 662-663 ◽

Cited By ~ 1

Author(s):

T. Oikawa ◽

H. Kosugi ◽

F. Hosokawa ◽

D. Shindo ◽

M. Kersker

Keyword(s):

Transfer Function ◽

Phase Contrast ◽

Evaluation Method ◽

Amorphous Film ◽

Imaging Plate ◽

X Rays ◽

Special Shape ◽

Contrast Transfer Function ◽

Contrast Image ◽

Specimen Shape

Evaluation of the resolution of the Imaging Plate (IP) has been attempted by some methods. An evaluation method for IP resolution, which is not influenced by hard X-rays at higher accelerating voltages, was proposed previously by the present authors. This method, however, requires truoblesome experimental preperations partly because specially synthesized hematite was used as a specimen, and partly because a special shape of the specimen was used as a standard image. In this paper, a convenient evaluation method which is not infuenced by the specimen shape and image direction, is newly proposed. In this method, phase contrast images of thin amorphous film are used.Several diffraction rings are obtained by the Fourier transformation of a phase contrast image of thin amorphous film, taken at a large under focus. The rings show the spatial-frequency spectrum corresponding to the phase contrast transfer function (PCTF). The envelope function is obtained by connecting the peak intensities of the rings. The evelope function is offten used for evaluation of the instrument, because the function shows the performance of the electron microscope (EM).

Download Full-text

Estimation of the noise in TEM image recorded on “imaging plate”

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100128055 ◽

1987 ◽

Vol 45 ◽

pp. 748-749

Author(s):

T. Oikawa ◽

N. Mori ◽

T. Katoh ◽

Y. Harada ◽

J. Miyahara ◽

...

Keyword(s):

Low Dose ◽

Quantum Noise ◽

Laser Light ◽

Imaging Plate ◽

Total System ◽

Electron Dose ◽

X Ray ◽

Image Recording ◽

Recording Material ◽

Highly Sensitive

The “Imaging Plate”(IP) is a highly sensitive image recording plate for X-ray radiography. It has been ascertained that the IP has superior properties and high practicability as an image recording material in a TEM. The sensitivity, one of the properties, is about 3 orders higher than that of conventional photo film. The IP is expected to be applied to low dose techniques. In this paper, an estimation of the quantum noise on the TEM image which appears in case of low electron dose on the IP is reported.In this experiment, the JEM-2000FX TEM and an IP having the same size as photo film were used.Figure 1 shows the schematic diagram of the total system including the TEM used in this experiment. In the reader, He-Ne laser light is scanned across the IP, then blue light is emitted from the IP.

Download Full-text