1. An electronic device to be used in a vibration environment having acceleration peaks of greater than 0.1 G and a temperature of which may exceed 90° C. for a period of more than 10 minutes, the electronic device comprising:an electronic component;
a protective shield comprising:
a phase change material having a phase change temperature of between 20° C. and 90° C., the phase change material forming an inner layer,
an antivibration gel having at least one of hyperelastic or viscoelastic behavior at 20° C., the antivibration gel forming an outer layer, and
a separation barrier positioned so as to separate the phase change material inner layer and the antivibration gel outer layer,
the antivibration gel outer layer being positioned, at least partly, in contact with the electronic component, and having a thermal conductivity of greater than 1 W/m·K at 20° C.