DC COMICS: DC Animated Universe Bio Atom (Raymond Plamer)

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ANIMATED BIO BY DCAU WIKI
Prior to his League days, his scientific work was known to Vandal Savage, who attempted to use it to build a superweapon, before being stopped by the Justice League.[2 ]

After the Thanagarian invasion, the Atom joined up with the expanded Justice League. When Amazo returned to Earth, the Atom secretly accompanied Lex Luthor to his refuge, because of his expertise in nanotechnology, to help him building a nano-disassembler beam cannon that would stop the android. When Amazo proved resistant to even that, as a last resort Atom shrunk both himself and Luthor down to the subatomic level.

The Atom's expertise was of vital importance when the League was menaced by the Dark Heart, an alien war machine based on nanotechnology. After shrinking to microscopic size, he was able to enter the machine and discern its programming and purpose, but was unable to destroy its control center. Instead, he interrupted its flow of liquified matter feeding its nano-assemblers with raw materials—much in the same way a blocked artery stops the flow of blood to the heart and induces a heart attack.

In the aftermath of Superman and Captain Marvel's titanic fight over Lexor City, The Atom examined a device that Superman had been suspicious of (since it incorporated Kryptonite), and was embarrassed to report that it appeared to be completely benign, as Lex Luthor had insisted it was.

When the Watchtower was temporarily shut down by an accidental discharge of its Binary Fusion Generator, the Atom worked in the reactor room, trying to shorten the time needed to reboot the system. Unfortunately, he was incapacitated by Galatea, who was set on blowing up the reactor, and the Watchtower and the League with it.

The Atom was one of many Leaguers who leaped into action to combat Darkseid's second invasion of Earth.

COMIC BOOK BIO BY COMIC VINE
As a golden age hero, the Atom's origin has been told and retold numerous times, however there are always some unifying events. An atomic scientist and genius Ray Palmer was working on a method of reducing objects in size using white dwarf star matter. While he was on a wilderness expedition he became trapped in an underground cave after a collapse in the tunnel. With the threat of death imminent, he improvised an escape. Using a piece of white dwarf star matter he fashioned it into a lens (in some versions the lens is from a set of glasses of the diamond from an engagement ring) which he deduced if focused in the correct way would allow him to shrink to a small size upon entering into the beam of the lens and escape from one of the cave's small openings and seek help. He was successful and upon rescuing himself (in some cases of the origin there are people with him) he returns to civilization where he decides to embark on a superhero career, incorporating the size reduction ability into a belt which he wears.

His early adventures occurred in Ivy Town alongside his long time girlfriend Jean Loring. Ray was also one of the first heroes to join the ranks of the Justice League of America as it expanded its roster from the original seven members.

Others have worn the mantle and costume which Ray made so famous - Adam Cray and Ryan Choi. There is no direct connection with the golden age Atom, Al Pratt.