What is the best method for decapsulation?
Manual acid decap methods (using eye-dropper and hot plate) provide a comprehensive means of fully decapsulating plastic-packaged components.
Why chooseultra TEC decapsulation systems?
ULTRA TEC provides a range of mechanical decapsulation systems for all budgets. The initial removal of bulk material from the package is typically known as pre-cavitation. Depending on the package type, chemical decapsulation may work well for the entire decapsulation.
What is decapsulation of packaged devices?
Decapsulation of packaged devices exposes the internal elements of the device under test. Opening devices by this method allows the inspection of the die, interconnects and other features typically examined during failure analysis (FA), constructional analysis (CA) and destructive physical analysis (DPA).
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How do you decapsulate plastic encapsulated parts?
The preferred technique for decapsulating plastic encapsulated parts is to use a jet etch apparatus, which is commercially available from a few sources. This type of equipment directs a jet of heated acid toward the surface of the package in an etch head, causing a chemical reaction and erosion of the encapsulation, eventually exposing the die.
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Some decapsulation techniques seem as basic as breaking a package open or heating to melt a soldered seal. Chemical removal of polymeric encapsulating material with acid is standard.
What is the temperature of sulfuric acid in a die?
When concentrated sulfuric acid is used, it is heated to 280-290 o C. Fuming nitric acid and mixtures are used at a temperature of 75-80 o C. Because the acid stream is concentrated over the die, the leads and the rest of the package body remain intact.
What is the difference between fuming nitric and fuming sulfuric acid?
Fuming nitric acid is reported as a specific solvent for phenolic epoxies, whereas fuming sulfuric is specific to anhydride epoxies (Ref. 1). Models are available for fuming nitric acid, concentrated sulfuric acid and mixtures of fuming nitric and fuming sulfuric acid.
