Computing device and method for checking via stub

A computing device, comprising:

• a storage device;
• at least one processor;
• and
• a check system comprising computerized code in the form of one or more programs, which are stored in the storage device and executable by the at least one processor, the one or more programs comprising:
• a check interface control module operable to display a check interface;
• a line selecting module operable to select signal transmission lines from a currently run PCB layout according to input through the check interface;
• a design standard obtaining module operable to receive the reference stub length input through the check interface;
• and
• an information check module operable to determine the actual stub length of each via stub of each via each selected signal transmission line connected to according to an information file corresponding to the currently run PCB layout, determine that a design of one via stub satisfies the design standards, if the actual stub length of the one stub via is less than or equal to the reference length, determine that the design of one via stub does not satisfy the design standards if the actual stub length of the one via stub is greater than the reference stub length, and determine that the via the via stub of which is not designed to satisfy the design standards is a to-be-checked via.