Structure and generation method of clock distribution network

A method, comprising the following steps:

• step S1:
• applying a clock tree structure at least between or among the multiple local circuit modules;
• wherein, the clock tree structure has a root node which is a clock access point of the clock distribution network and branch interconnects distributed between or among the local circuit modules;
• step S2:
• starting from the clock access point of the clock distribution network to an end point of the clock distribution network along the branch interconnects, determining whether to apply clock mesh structures within a next local circuit module according to at least one of the following:
• a proportion of clock nodes in the local circuit module, a proportion of sequential circuits connected by a clock in the local circuit module, a ratio of the total length of clock routing wirings in the local circuit module to a perimeter of the local circuit module, or a proportion of timing violation in the local circuit module;
• if the proportion of clock nodes in the next local circuit module is more than 30% of the total local circuit nodes, or the proportion of sequential circuits connected by the clock is more than 20% of the total circuits in the local circuit module, or the total length of the clock routing wirings in the local circuit module is 3 times longer than the perimeter of the local circuit module, or the proportion of the timing violations in the next local circuit module is more than a predefined percentage, applying the clock mesh structures in the next local circuit module;
• otherwise, applying the clock tree structure in the next local circuit module
• step S3:
• designing and fabricating an integrated circuit based at least on the resulting structure of the clock distribution network.