The Steve Jobs biopic will focus heavily on the late Apple founder's relationship with his eldest daughter.

The Sony produced biopic is based on a script by writer Aaron Sorkin and he has revealed the thing that most fascinates him about Jobs is his life away from the tech world.

Jobs - who died in October 2011 at the age of 56 after being diagnosed from complications caused by a pancreas neuroendocrine tumour - fathered a child, Lisa Brennan-Jobs, in 1978 with his long-time partner Chrisann Brennan but he denied paternity for two years claiming he was sterile, before eventually acknowledging Lisa was his daughter.

Speaking about this part of his life, Sorkin said: ''In the case of Steve Jobs, it's the relationships he had - particularly with his daughter, Lisa - that drew me to it.''

Comparing his writing process on the Jobs biopic to his script for 2010 movie 'The Social Network' - which was about Facebook founder Mark Zuckerberg, he added: ''Both films are much more about the people than the technology they invented. With 'The Social Network', I was interested in the psychology of the world's most successful social networking system being invented by the world's most anti-social guy.''

During his research, Sorkin, 53, was able to speak with Lisa to find out more about her relationship with her father - who went on to have three more children, son Reed and daughters Erin and Eve, with his wife Laurene Powell.

According to EmpireOnline, he said: ''She didn't participate in Walter Isaacson's book, because her father was alive at the time, and she didn't want to alienate either of her parents, so I was very grateful that she was willing to spend time with me. She is the heroine of the movie.''

Danny Boyle is directing the project, which will follow Jobs during three stressful, high-profile product launches including that of the first Macintosh computer in 1985 and the debut of the iPod in 2001.

However, Sony are yet to find an actor to take on the lead role with Christian Bale and Leonardo Dicaprio turning down the part.

Michael Fassbender is reportedly in negotiations to play Jobs.