Meaning
Non-destructive acoustic testing evaluates the structural integrity of packaged microelectronic devices to identify internal delamination. Acoustic screening of this type, or c-sam screening, represents a mandatory step in quality control for automotive silicon imports. The State Administration for Market Regulation utilizes these test logs to verify compliance with national safety rules before components enter the mass market.
This ensures that only verified batches reach localized assembly lines.
Acoustic Signature
High-frequency ultrasonic waves bounce off internal interfaces to map material density variations and air gaps. Clean signatures indicate robust adhesion between silicon dies and plastic molding compounds. Minor deviations reveal localized separation before full structural detachment happens.
Inspection Protocol
Provincial inspection bureaus supervise the execution of these acoustic tests during raw batch entry. Designated laboratories must submit digital scans to the national database within five business days of delivery. This rapid procedure ensures trace tracking of defective lots across municipal warehouses.
Defect Liability
Foreign component suppliers hold primary responsibility for failures detected during acoustic examination. When batches display systemic voids, the importing agent can enforce compensation provisions under the Civil Code of the People’s Republic of China. This statutory framework overrides conflicting clauses in commercial supply agreements.
