Therefore, the capacitor package size and capacitance value should be considered together. Overall the ultimate goal is to achieve the target impedance requirements with the least amount of capacitance, light installation and wiring stress.
An important issue with capacitive decoupling is the decoupling radius of the capacitor. Most of the data will mention that the capacitor should be placed as close to the chip as possible, and most of the data are talking about the placement distance from the perspective of small loop inductance. Indeed, the small inductance is an important reason, but there is another important reason that most of the materials do not mention, and that is the problem of the capacitance decoupling radius.