Several devices from Apple’s (AAPL) next-generation lineup will reportedly launch later than most industry watchers expect due to various delays with their development. Plugged-in analyst Ming-chi Kuo of KGI Securities on Thursday circulated a research note claiming Apple’s iPhone 5S will not launch as soon as most sell-side analysts believe, and neither will its upcoming entry-level iPhone or the second-generation iPad mini.

Ming-chi points to a number of different reasons for the various delays. For the iPhone 5S, the analyst said Apple is having difficulties integrating a new component — a fingerprint sensor — into the device.

“Apple has to work out how to prevent interference from the black and white coating material under the cover glass,” Ming-chi wrote in the note, which was picked up by AppleInsider. “Apple is the first to attempt this function and technology, and time is needed to find the right coating material, which will likely affect iPhone 5S shipments.”

He also noted that problems with the development of iOS 7 will play a role in the delayed launch. An earlier report suggested that iOS 7 will be getting a major UI overhaul.

Ming-chi stated that the launch of Apple’s new entry-level iPhone has been pushed back due to manufacturing difficulties involving the plastic case, which is said to be extremely thin. Finally, the iPad mini will be released later than expected because of difficulties manufacturing the tablet’s upgraded Retina display panels.

Despite the various setbacks, the analyst still believes all three devices will launch in the third quarter.