Driving signals : Dead-gap
When driving the H-bridge it is important to note that because PMOS and NMOS transistors turn on and off at different speeds, it is possible to create transient short-circuits along the two vertical paths of the H-bridge which can destroy the transistors.
The solution to this, is to have a dead-gap - I.e. a period where there are no drive signals when transitioning between forward drive and reverse drive. This will ensure that all the transistors in the bridge are in an off-state before turning the next pair of transistors on.
Many MCU's (e.g. Atmel) have dead-gap circuits as part of their PWM signal generator hardware.
Although the term is not mentioned in the above quote, it is addressing the subject of "SHOOT-THROUGH
PREVENTION". "SHOOT-THROUGH" is the term used to describe "transient short-circuits along the two vertical paths of the H-bridge which can destroy transistors.."