M.Tech

Hi,
After completing electronics, engineers may find employment in electricity boards, atomic power plants, hydroelectric power plants, thermal power plants robotics, biomedical electronics, power corporations, hydro-electricity sector, production plants, natural gas plants, petroleum, steel and chemical plants.
Yes, now many universities and institutes are preferring Ph.D holder for job
Also there is huge demand for research professional in the country.
In regards to your question, whether there is any difference in Correspondence and Regular course, I would say it varies from one subject to the other also from one degree to the other. However in general a course through distance learning does not have as much value as the regular one so if you can do a regular course, it would hold a lot of importance and thus be a much better option.
The acceptability and recognition of a full time course is higher in industry and the long term career gains are good. Correspondence courses are ideally meant for those who are working and cannot leave their jobs to further their education. It is only to leverage ones experience and not so much as a standalone degree.
The employ-ability of a full time degree holder is the most and those with a distance education degree may face a drawback as far as employment options with MNCs are concerned. However, what is also relevant is your experience; skills and profile should match the profile needed for the job and organization. Thus it would be best for you to pursue a full time course.
I hope this information helps. Please feel free to revert.
Wish you luck.

Basic Eligibility:
The eligibility criteria for pursuing a master’s degree are holding a bachelor's degree in (B.E/B.Tech) or any other equivalent branches of engineering. The duration for this course is 2 years.
Job Prospects:
Robotics engineering is one of the recognized professional careers in India. There are ample opportunities in this field for robotics engineers both in India as well as in abroad countries. From manufacturing line robots to experimental robotics for the military, medical and automotive industries, the future of robotics engineering certainly offers a variety of opportunities for professionals entering the field. A candidate having an M.E. degree in robotics can find employment opportunities in space research organizations such as ISRO and also in industries which manufacture microchips.
Most robotics engineers are employed in laboratories, space exploration, manufacturing plants, mining and organizations. Now-a-days gaming industries are possibly providing the most enjoyable variation of the kind of intelligence provided by robotics. Most robotics engineers are employed by private robot manufacturers or robot users. Robotics engineers who work for robot manufacturers are sometimes called robotics test engineers or automation system engineers. Professionals in this career can also opt for teaching jobs in universities and colleges.
Some job profiles: -
Sales
Trainers
Analysts
Researcher
Supervisors
Robotics Technicians
Robotics Test Engineers
Robotics System Engineer
Senior Robotics Specialist
Remuneration: -
Robotic engineering is one of the most promising and rewarding field. Robotic engineer's income mostly depends upon their qualifications, experience and organization. Robotic engineers working in abroad can get lucrative income. For those who want to pursue a career in robotics engineering, their initial salary starts from Rs. 5-6 lakhs per annum. Benefits usually include paid retirement plans, holidays and vacations and health insurance.
Institutes Offering M.Tech. - Robotics
Indian Institute of Information Technology, Allahabad (IIT A) - Integrated Master of Technology in Robotics
S.R.M Institute of Science and Technology - Master of Technology in Robotics
University of Petroleum and Energy Studies - M.Tech Robotics Engineering
Vel Tech Dr.RR & Dr.SR Technical University, Chennai - Master of Engineering/Master of Technology in Robotics
Many other institutes also offer the same degree course all over India