What is PD IEC/TR 63133- Ageing level estimation for semiconductor devices about?  
PD IEC/TR 63133 is a technical report that discusses semiconductor devices.
PD IEC/TR 63133 specifies a design technique of performance estimation storage element, which can monitor semiconductor ageing and characterize ageing level. The estimated ageing level can be used to improve the reliability of the system.
Who is PD IEC/TR 63133 – Ageing level estimation for semiconductor devices for? 
PD IEC/TR 63133 on semiconductor devices is useful for: 
- Semiconductor foundries  
- Automation engineer  
- Mechanical engineers  
- Manufacturer of electronic devices  
- Manufacturer of automobile  
- Aerospace industry
- Military 
- Consumers 
- General industries
Why should you use PD IEC/TR 63133 - Ageing level estimation for semiconductor devices?  
A semiconductor device is an electronic component that functions by utilizing the electronic properties of semiconductor material.
Semiconductor ageing is a serious threat to the reliability of a system. The ageing level of semiconductor components can be described as the degree of semiconductor ageing under certain operating conditions, including voltage, frequency, temperature, and usage rate. Over a certain life of a semiconductor device, ageing is caused by several phenomena, including NBTI, PBTI, HCI, etc., and results in signal delay.
As a result, semiconductor ageing will assist you in ensuring that defects reduce a device's performance and, ultimately, cause system failure.
For reliability, PD IEC/TR 63133 specifies that ageing should be properly monitored and alerted throughout the functional operation.
Thus, PD IEC/TR 63133 introduces the method to estimate the degree of ageing of a semiconductor device, in other words, the ageing level.
PD IEC/TR 63133 proposes an efficient ageing monitoring scheme by using a shadow latch and phase-shifted clock. This utilizes less power and helps you improve the reliability of systems.
