SU1154224A1 - Glass for coating on steel - Google Patents

Abstract

GLASS FOR COATINGS POSTS, including SiO, ACO, BaO,, characterized in that, in order to reduce the dielectric constant and increase the volume resistivity, it additionally contains SrO and V, 0 in the following ratio of components, wt.%: SiOj30.90- 34.70, 4.95-5.35 BaO31,40-51.80 VgO, 4.80-5.30 SrO5.00-26.60 0.90-1.00 VO a

Description

ate

four

ISD

 four

I

The invention relates to the technology of silicates and can be used in microelectronics to create insulating coatings on a steel substrate for switching circuits as well as a mechanical coating of the metal parts of microelectronic devices.

Known glass containing, by weight. SiOj 44.7-53.8; , 12.6-16.3; SrO 30.0-40.2} Cr O ,. 0.5-1.0; 0.5-3.0.

Said glass is intended to protect refractory metals from oxidation when operating in air at elevated temperatures fl.

The disadvantages of this glass composition are not sufficiently large TKPR (71-8 O10 degrees-) to be able to use it as a coating for steel and low dielectric properties (dielectric constant at f 1.0 MG 9.4-14.7).

The closest to the invention in technical essence and the achieved result is glass for protecting steels and alloys from high-temperature gas corrosion of the following composition, wt.%: SiOj 27.231, 2; BaO 35.7-39.7, - BgO 5.3-7.3, TiO 13.4-15.4; GrjO, 3.5-5.5; A170 6.7-8.7; CgO 0.1-0.3 fz.

The disadvantages of the known glass are rather high dielectric constant (11.5-11.9) and low specific volume electrical resistivity Ohm-m.

The purpose of the invention is to reduce the dielectric constant and increase the volume resistivity.

The goal is achieved by the fact that glass dp coatings on steel, including SiOj, AlgO, BaO,, additionally contains SrO and MfOi in the following ratio of components, wt.%:

Si02 30.90-34.70

MgO, 4.95-5.35

You 31.40-51.80

BjO, 4.80-5.30

SrO5.0-26.60

 0.90-1.00

Synthesis of glass is carried out in a gas fiery furnace at 1400-1450 C in corundum crucibles with a capacity of 0.1 l.

42242

The raw materials used are quartz sand, alumina, boric acid, barium carbonate, strontium carbonate, vanadium carbon dioxide 5.

The glass mass is granulated into water, dried and spread to a specific surface of 5000-6000 cm / g. The coating on the plates of steel is carried out by electrophoresis or by applying a water suspension. The plates are dried in air at 90-100 ° C for 15-20 minutes, then burned in an electric furnace at 8005 850 ° C for 15-20 minutes. During the cooling process, the coating crystallizes.

In tab. 1 shows the estimated glass composition.

In tab. 2 shows the physicomechanical properties of the proposed glass compositions. The selected ratio of the component provides the dielectric constant of the proposed glass by 32–38% lower than that of the known enamel and high specific volume electrical resistance (by 3-4 times the order).

The high dielectric characteristics of the proposed glass in combination with TCLE, matching with steel TKPR, 30 allows to obtain a high-quality electrically insulating coating on steel.

The process of applying a known coating is substantial. differs from the thickness of film technology for the production of vitreous coatings,

Steel enameling involves the preparation of a puffer, which includes fritted enamel, lina and chromium oxide in certain

40

quantitative ratios. The enamel firing temperature is 11501 .180 ° C. The manufacture of an electrolysis iijioHHoro coating based on the proposed glass is carried out

45 electrophoresis with subsequent firing of the elements of the conductive scheme.

The firing temperature of the coating is 800-850 s, i.e. 300330 ° C lower than that of the known enamel. A high firing temperature is unacceptable due to the melting of the copper conductors when creating multi-level wiring.

Thus, a comparative analysis showed that

55, the proposed glass differs from the known one with improved dielectric characteristics, low temperature, and firing.

Table 1

table 2

Claims (1)

GLASS FOR COVERINGS OF STEEL, including SiO ₂ , A1 _g 0 ₃ , BaO, B _? 0 ₃ , characterized in that, in order to reduce the dielectric constant and increase the specific volume resistance, it additionally contains SrO and V ₇ 0 ₅ in the following ratio of components, May SiOj 30.90-34.70 A1.0 _? 4.95-5.35 Wow 31.40-51.80 in _r about ₃ 4.80-5.30 Sro 5.00-26.60 v ₂ o _? 0.90-1.00 SL 4 * Yu go 4 *> f