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Technical Field 1 of the Invention The present invention belongs mainly to the technical field of a
therapeutic apparatus for an ultrasonic diagnostic apparatus and the technical field of an
ultrasonic radar imaging apparatus, and will be described below as a diagnostic apparatus case.
[Technical background of the invention and its problem 1 in the case of grooving ceramics] In
the method using a conventional rotary diamond grinding wheel, the cutting slit is often limited
to a straight line. When the groove is cut in a circular shape when the curvature is small, a
rotational grinding method using a dedicated pipe edge is used. Apart from rotational grinding,
ultrasonic cutting is also carried out using defined smooth bones. A method of high temperature
fusion cutting by laser processing is used. With these methods, groove widths of 100 μm or less
are difficult, so high-precision micromachining has lower performance than diamond tools, so
applications for ceramics are limited and laser-assisted etching methods are used instead. Is an
available method. The laser-assisted etching method can selectively and finely groW the part
selectively With high accuracy by a method of locally strengthening the etching action of the
high alkali solution by laser heat. The ceramic PZ O used for ultrasonic diagnostic equipment has
a silver electrode baked for polarization addition after firing, but since silver is simultaneously
corroded by the laser asis 1- etching, the silver electrode used for polarization addition is It can
not be reused as a piezoelectric body drive electrode like other groove cutting methods.
SUMMARY OF THE INVENTION The present invention has been made in view of the related art,
and it is an object of the present invention to provide means for masking the etching / slit
portion and forming a ceramic dielectric electrode. [Invention! ! 1) In order to achieve the above
object, the outline of the present invention is to fill the etching slit portion with a heat-soluble
insulating material such as paraffin in the etching slit, carry out the conductive treatment of the
ceramic surface, dissolve the filling material once, and fill the material again It is characterized in
that an electrode is formed by plating. DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1
is a block diagram of a jig relating to the manufacturing method of the present invention. A table
4 is provided on the container 5 filled with the etching solution 6. The laser device 1 is disposed
on the ridge 4 in a rough manner. The laser device 1 comprises a laser tube 2 for generating a
laser beam and a mirror 3 for scanning the laser beam emitted from the laser tube 2. The
ceramic 9 on the surface of which the electrode is vapor-deposited is fixed in a container 5 on a
table 8 H & -J. Then, as shown in the perspective view of the ceramic 9 of FIG. 2, the surface of
the electrode 10 is scanned with a laser beam to form concentric grooves 11.
In addition, it is better to stir the etching solution by the stirrer 7. The slit width of the ceramic
by laser assis 1- etching depends on the laser beam, but it is performed in a flow condition to
efficiently use the etching action of the alkaline solution, and the light speed is 20μm from the
necessity as a liquid passage. By setting the above, the etching powder of the ceramic is
discharged to improve the etching efficiency and accuracy. As a method of forming an
application electrode of about 5 to 10 μm on the ceramic surface divided by the slit, for
example, the slit portion is filled with paraffin and chemical plating is performed, the ceramic
surface is made conductive, and once the paraffin is melted away Refill and electroplate.
Chemical plating is a method of depositing a metal film on the surface of a nonconductive object
using a chemical reaction. In this example, a reducing agent such as formaldehyde is added to an
aqueous ammoniacal silver nitrate solution to deposit a silver film on a ceramic surface. Let
Electroplating is performed using this silver film as a conductor, but before that, paraffin in the
slit portion is removed and refilled with new paraffin to make it non-conductive, so that no
electroplated surface is formed in the slit portion. In this way, the surface of each sector
separated by etching can constitute an independent electrode. [Effects of the Invention] If the
present invention is used, it is possible to form an electric furnace (a furnace can be formed on
the surface of each subdivided ceramic with a fine and well-defined ceramic surface and, for
example, radial to concentric electrodes) By focusing ultrasonic waves on a specific human body,
51 units @ weave without an acoustic lens by constructing an ultrasonic transducer with a side
wave, obtain clear organ extraction and resolution with little side waves, or tissue
characterization (T It becomes possible to form a sound beam suitable for 1ssue
Brief description of the drawings
FIG. 1 is a block diagram showing one embodiment of a jig used in the manufacturing method of
the present invention, and FIG. 2 is a perspective view showing an example of processing of
1 · · · laser device, 6 · · · etching liquid 9 · · · ceramics
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description, jps62164439
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