Apple's latest flagship iPhone 5s incorporates 64-bit A7 microprocessor built by its arch-rival Samsung, scotching rumours that the US based iPhone maker would shift orders away from its competitor.
The South Korean firm had also manufactured all preceding chips in Apple's A-range of microprocessors for the iPhone and iPad devices, accroding to IFixit.
Chipworks said in a statement that through early analysis, the device is confirmed to be fabricated at Samsung's Foundry.
"That being said, we suspect we will see Samsungs 28 nm Hi K metal Gate (HKMG) being used," the firm said.
"We have observed this same process in the Samsung Exynos Application processor used in the Galaxy S IV."
Whilst the incorporation of hardware from Samsung, the A-series processors deployed iDevices are based on Apple's modification of ARM silicon.
iPhone 5 also uses NXP's M7 co-processor, which assists in measuring motion data from the accelerometer, gyroscope and compass.
Claimed to be the most advanced iPhone yet, the new 5S model runs on new iOS 7 and incorporates the new A7 chip and 64-bit technology which helps in improving performance during opening apps, editing photos, in addition to playing graphic-intensive games.
Other features of the new device include 8mp iSight camera and Touch ID fingerprint sensor that enables secure unlocking of phone with a finger touch, while offering authentication for purchases from Apple's website.