Dear Nandha,        

 Yes definitely you can get admission for B.Tech course after completing diploma in Engineering through Lateral entry scheme.

Lateral entry scheme is intended to admit meritorious diploma holders to the second year of the B.Tech courses to acquire a degree in engineering directly in the second year .

The exam procedure, the course and the degree everything remains the same for the applying applicants

Eligibility:
Candidates who have completed first year in B.Tech from a recognised university or passed three years diploma after 10+2 with minimum aggregate of 60% marks in science and maths field.
Candidates who are appearing for the final year diploma examination are also eligible to apply for direct second year engineering admission

Few B.Tech lateral entry Colleges in India are given below .:

Dharmsinh Desai Institute of Technology
Hindustan Institute of Technology, Chennai
IIIT- Allahabad
Indraprastha University, New Delhi
Institute of Technology, Nirma Univ, Ahmedabad
International Institute of Information Technology, Hyderabad
Jabalpur Engineering College
Jamia Millia Islamia, New Delhi New Delhi
JNTI Hyderabad