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A kind of activation inhibitor used in the production of thin circuit products and its preparation method

A technology of inhibitors and thin lines, which is applied in the field of activation inhibitors and its preparation, can solve the problems of product scrapping, permeation, gold residue, etc., and achieve the effect of long bath life, easy operation and management, and no quality risk

Active Publication Date: 2020-09-04
宏维科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of using palladium sulfate or palladium chloride to activate circuit boards in the prior art, this method is prone to abnormalities such as seepage plating, residual gold, and wiring when the production line width and line spacing are below 50um / 50um, resulting in product To solve the problem of scrapping, the present invention provides an activation inhibitor for the production of thin line products and a preparation method thereof

Method used

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  • A kind of activation inhibitor used in the production of thin circuit products and its preparation method
  • A kind of activation inhibitor used in the production of thin circuit products and its preparation method
  • A kind of activation inhibitor used in the production of thin circuit products and its preparation method

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preparation example Construction

[0034] The present invention also proposes a preparation method of an activation inhibitor, the preparation method comprising:

[0035] Step 1: take an appropriate amount of water, sulfuric acid, palladium salt and hydroxypropanesulfonic acid pyridinium salt according to the above ratio;

[0036] Step 2, adding the sulfuric acid weighed in step 1 to the water weighed in step 1 for circulation, until the solution is cooled;

[0037] Step 3, adding the palladium salt and hydroxypropanesulfonic acid pyridinium salt in step 1 to the mixed solution in step 2 for circulation, and finally forming the solution after filtering;

[0038] The addition of palladium salt and hydroxypropanesulfonic acid pyridinium salt in step 3 is in no particular order, or added simultaneously.

[0039] In some embodiments, the step 2 needs to be circulated for more than 4 hours.

[0040] In some embodiments, the solution in step 2 needs to be cooled to 20-30 degrees Celsius.

[0041] In some embodimen...

Embodiment 1

[0043] An activation inhibitor used in the production of thin line products, the activation inhibitor is prepared from the following raw materials in weight percentage:

[0044] Sulfuric acid 2%, palladium salt 0.001%, hydroxypropanesulfonic acid pyridinium salt 0.003%, and the rest is water.

[0045] In this example, the palladium salt is palladium sulfate.

Embodiment 2

[0047] Prepare the method for activation inhibitor in embodiment 1, described preparation method comprises:

[0048] Step 1: take an appropriate amount of water, sulfuric acid, palladium salt and hydroxypropanesulfonic acid pyridinium salt according to the above ratio;

[0049] Step 2, adding the sulfuric acid weighed in step 1 to the water weighed in step 1 for circulation, until the solution is cooled;

[0050] Step 3, adding the palladium salt and hydroxypropanesulfonic acid pyridinium salt in step 1 to the mixed solution in step 2 for circulation to form the solution;

[0051] The addition of palladium salt and hydroxypropanesulfonic acid pyridinium salt in step 3 is in no particular order, or added simultaneously.

[0052] In this embodiment, a cycle of 4h is required in the step 2.

[0053] In this embodiment, the solution in step 2 needs to be cooled to 20 degrees Celsius.

[0054] In this embodiment, a cycle of 2h is required in the step 3.

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Abstract

The invention discloses an activating inhibitor for production of fine circuit products and a preparation method thereof. The activating inhibitor is prepared from the following components of 2% to 10% of sulfuric acid, 0.0001% to 0.008% of palladium salt, 0.003% to 0.12% of pyridinium hydroxy propyl sulfobetaine, and the balance of water. The activating inhibitor has the advantages that the circuit board products with distance of 15mum / 15mum can be produced in a batch way; the service life of a tank liquid is long; the quality risk is avoided; the operation and management are convenient.

Description

technical field [0001] The invention relates to the technical field of production of thin line products, in particular to an activation inhibitor used in the production of thin line products and a preparation method thereof. Background technique [0002] In the traditional electroless chemical nickel-gold (or electroless chemical nickel-palladium-gold, electroless chemical palladium-gold) process, palladium sulfate or palladium chloride is generally used to activate the circuit board. For products below 50um, it is very easy to have abnormalities such as plating, residual gold, and connection, which will lead to product scrapping. [0003] Manufacturers generally reduce the defect rate of products by reducing the contact time between circuit boards and chemicals, reducing the reaction temperature, reducing the palladium content in the activation solution, prolonging the cleaning time, and reducing the temperature of electroless nickel to reduce the defective rate of products...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18
CPCC23C18/1879
Inventor 唐红艳
Owner 宏维科技(深圳)有限公司