Welcome to LHTFPCB

The LHTFPCB project is a Collaborative Research Project funded by The Clean Sky JTI (Joint Technology Initiative).

Clean Sky was born in 2008 and represents a unique Public-Private Partnership between the European Commission and the industry. It is managed by the Clean Sky Joint Undertaking (CSJU) until 31 December 2017. It was set up to bring significant step changes regarding the environmental impact of aviation. Clean Sky will speed up technological breakthrough developments and shorten the time to market for new and cleaner solutions tested on full scale demonstrators, thus contributing significantly to reducing the environmental footprint of aviation (i.e. emissions and noise reduction but also green life cycle) for our future generations.

LHTFPCB acronym stands for: Large High Temperature Flexible Printed Circuit Board

Summary description of project context and objectives

This CleanSky Project (LHTFPCB – Large High Temperature Flexible Printed Circuit Board) aims to support Rolls-Royce in the design of a high temperature flexible PCB and, through trials of flexible laminates manufactured from existing and brand new advanced polymers, progress the temperature at which a flexible printed circuit can operate from the current state of the art maximum of 200°C into the desired range of 260°C (minimum) up to 400°C (target).

The Project also aims to develop the materials and manufacturing processes that enable this high temperature performance in a large format, such that the required overall length of 5m can be implemented in a single piece multilayer printed circuit, without joints.

Validation to TRL6 is to be achieved through coupon tests on representative hardware in a bespoke environmental chamber, subjecting the coupons to combined heat and random vibration loading.

Full size PCBs will be supplied for integration and test at engine level. These engine tests are Rolls-Royce responsibility; the Project will provide support to integration and test.