Patent ID: 11942379
Assignee: UNITY SEMICONDUCTOR
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 15:
16. A method of inspecting and detecting a defective bonding interface in a sample substrate comprising at least one element disposed on a support, a bonding interface being defined between the at least one element and a main face of the support, an outer surface of the at least one element being exposed on a front side of the sample substrate and at least partially defining an exposed surface of the sample substrate, the method comprising:
placing the sample substrate in a measurement system;
using the measurement system to establish an inclination map of the exposed surface, the inclination map comprising a plurality of local inclination measurements relative to a reference surface corresponding to the main face of the support;
analyzing the inclination map including:
calculating inclinations of predefined zones of the exposed surface, an inclination of a zone being a representative value of the local inclination measurement associated with the zone; and
identifying among the predefined zones at least one identified zone having an inclination deviating by more than a given threshold from an inclination of the reference surface, the at least one identified zone having a defective bond between the at least one element and the support.