Mid Loss Laminates That Outrun Their Price Class
Mid-loss laminates paired with low-roughness copper foil match high-cost ultra-low-loss performance at a fraction of the raw panel price.
Thermal Shock Endurance
Extreme Temperature Resistance
The ability of a printed circuit board to withstand rapid, extreme transitions between low and high temperatures without suffering physical damage or circuit failure defines its structural durability. Evaluating thermal shock endurance involves cycling the assembly from minus fifty-five to over one hundred and twenty-five degrees Celsius within seconds. This stress testing reveals weaknesses in plated through-holes and solder joints.
High performance in this test ensures board reliability in military and aerospace applications.
Physical Failure Mechanisms
Differences in the rate of thermal expansion between the copper plating and the laminate material cause strain at the through-hole knee. Low thermal shock endurance leads to copper cracking and circuit discontinuity. This thermal stress is a leading cause of early field failures in harsh environments.
Substrate Material Influence
Selecting laminates with low coefficients of thermal expansion and high-ductility copper plating reduces the stress experienced during rapid thermal changes. To optimize thermal shock endurance, design engineers specify materials that match the thermal properties of the metal traces as closely as possible. Testing labs run hundreds of automated hot-to-cold transfer cycles to verify that the board designs meet the strict standards required for critical applications.
This verification confirms that the mechanical joints do not fail under environmental stresses.