Copper pour

In electronics, the term copper pour refers to an area on a printed circuit board filled with copper (the metal used to make connections in printed circuit boards).

Another reason for using copper pour is to reduce the amount of etching fluid used during manufacturing.

[citation needed] Many early PCBs have a "hatched copper pour", sometimes called a "cherry pie lattice".

While solid copper pour provides better resistive characteristics, hatched copper pour is used to balance the heat and dilatation on both sides of the board in order to avoid warping of certain substrate.

Furthermore, it might be possible to adjust the impedance of high frequency traces by using hatched copper pour in order to reach better signal quality.