TH19719A - Method for deposition of solid substances on the base layer - Google Patents

Abstract

A method of accumulating solid substances on the surface of the basis on which the As solids are dissolved in a solvent to form a first solution, the solids are separated more finely before dissolving, less when deposited on the base layer and the density of the solids accumulation. On the base layer will receive Modulation, at least partially, by solid substance concentration Solid substances are omitted In a liquid-state gas and a solution, one is soluble in a liquid-state gas. Solvents also have the ability to press the freezing point of that gas. Is a liquid state, removed from the expansion of a liquid gas. First solution Is dissolved in a liquid gas to form a second solution with Sufficient concentrations of solvents associated with liquid gases, where the Becoming a solid of a liquid-state gas. There is significant amplification. The body of that gas The preferred concentration of solvent will be minimal to prevent Excessive use of hazardous solvents related to environmental conditions The solution is sprayed onto the base layer so that the liquid gas portion is instantly vaporized and the substance The second melt, containing the rest of the liquid gas, is in contact and therefore Will coat the surface of the base layer The remainder of the liquid gas evaporates. Go along with the solvent So the solid matter remains as Accumulation on the base layer This method has been specifically applied to the formation of such a detailed collection. The need in the electronics industry to coat printed circuit board contacts. To have flux before soldering

Claims (7)

1. a method for deposition of solid substances on the surface of a foundation Which includes Dissolution of a solid substance in a solvent in order to form a first solution, less solid matter is separated before dissolving. When deposited on the said base layer and the density of such solid substance on the said base layer will be Get at the very least partially adjusted By the concentration of solid substances within the solution One such A solid substance does not dissolve in a liquid gas. The first solution is soluble. In such liquid gases And the solvent can hit the freezing point of a gas state The liquid is kept when the gas that belongs to the liquid state is expanded. Dissolving the first solution in the aforementioned liquid gas. To cause a Second solution Which has a sufficient solvent concentration of the said solvent compared to that of the Is such a liquid state The solidification of such a liquid-state gas is Get significant protection against gas expansion; The second solution is sprayed onto the base layer. So that the state of the gas part The liquid will immediately vaporize and the second aqueous solution Which contains the remainder of the gas that is The liquid state is exposed and therefore Will coat the said base layer Evaporation of the remainder of the said liquid gas And solvent This is so that the solid substance remains to accumulate on the base layer. 2. Method of claim 1, in which the first solution is a saturated solution. 3. The method of claim 1, where the concentration of the aforementioned solvent is low on demand. So as to prevent significantly Solidification of a liquid gas from the Expansion of that gas 4. Method for claim 1, in which the said liquid gas is included. Liquid carbon dioxide 5. Method of claim 1 in which such solid substance is Flux that has been produced from Organic acids containing either atopic acid, salicylic acid, or citric acid. 6. Method of claim 5, in which the solvent is included. Organic solvents Containing methanol, alcohol or acetone 7. Method of claim 6, in which the aforementioned solvent contains methanol, the said liquid-state gas, includes: Liquid Carbon Dioxide, Solvent Concentration In comparison with the liquid gas, the solvent is approximately 15 percent by weight of the methanol in the liquid carbon dioxide.