serial number

cause of failure

  root cause

exclusion method

 1

Insufficient etching depth

Etching temperature too low

Heating etching solution

The etching time is too short

Appropriately extend the etching time

Etching solution aging, low concentration

Add new etching solution

 2

Anti corrosion layer peeling off

The temperature of the etching solution is too high

Reduce the temperature of the etching solution

Poor production of anti-corrosion layer

Strengthen the management of etching production

Ink has been stored for too long and has become ineffective

Replace with new ink

The secondary exposure time is too short

Extend the secondary exposure time

The baking temperature after development is too low or the time is too short

Raise the baking temperature or extend the baking time

Poor preprocessing

Strengthen quality management

 3

Brittle layer at the edge of the anti-corrosion layer

The secondary exposure time is too long

Appropriately shorten the secondary exposure time

 4

Etched surface with imprints

Insufficient fluoride content in pickling solution

Add fluoride

The pickling time is too short

Extend the pickling time

Etching solution imbalance

Analyze etching solution

Reasons for material quality

Replace materials

 5

    Poor smoothness

Excessive impurity content

Replace the solution

Poor quality of ferric chloride

Choose high-quality ferric chloride

Poor activation

Strengthen the activation process

Insufficient additive content

Regularly add additives

The concentration of chloride ions is too high

Add nitric acid or ammonium nitrate

Low concentration of phosphate ions

Add phosphoric acid

The material has coarse grain size

Replace materials