LB FILM(Langmuir – Blodgett Films ) || MODULE 4 || EC 465 || KTU MEMS || LECTURE 29

Hi all, today we are going to discuss about Langmuir-Bolgett process Langmuir-Bolgett process is used to produce very thin polymer films in molecular scale We can call this process as LB process or Langmuir-Bolgett process In this process, we are spreading volatile solvents on the surface of an active material In this LB process, we don't have to deposit a single monolayer on a single substrate We can create more than one layers in a single substrate In this way, we can create multi-layer structure This LB process is similar to micromachining manufacturing technique We can use this LB process as an alternative to micromachining LB films are good candidate material for exhibiting ferromagnetic, pyro and piezoelectric properties LB films also produce optical properties like refractive index and anti-reflectivity LB films are ideal material for micro-sensors and optoelectronic devices Let's see some examples of LB film applications in micro-systems The first one is Ferroelectric Polymer Thin Films Polyvinylidene Fluoride or PVDF is used in this film Applications of this type of film include sound transducers in air and water Tactile Senses, Biomedical Applications such as Tissue Compatible Implants, Cardiopulmonary Senses, Implantable Transducers and Senses for Prosthetic and Rehabitation Senses The second example is Coating Materials with Controllable Optical Properties These are widely used in broadband optical fibres which can transmit laser light at different wavelengths The second example is Coating Materials with Controllable Optical Properties These are widely used in broadband optical fibres such as micro-sensors The sensitivity of many electrical conducting polymeric materials to gases and environmental conditions make this material suitable for micro-sensors The third example is Ferro Electric Polymer Thin Films Coating Materials with Controllable Optical Properties, Micro-sensors Conductive polymers are also used in electrochemical biosensors such as micro-ambirometric glucose and galactose biosensors Thank you for watching this video. See you in the next video.