Purchased Intangible Assets, Net

12 Months Ended

Dec. 28, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Purchased Intangible Assets, Net

7. Purchased Intangible Assets, Net

Information regarding acquisition-related intangible assets is as follows:

	December 28, 2019						December 29, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	(in thousands)
Customer relationships	$	3,119	$	3,083	$	36	$	3,119	$	3,040	$	79
Purchased technology		5,148		4,910		238		5,148		4,338		810
Covenants not to compete		40		40		—		40		40		—
Backlog		80		80		—		80		80		—
Total amortizable intangible assets	$	8,387	$	8,113	$	274	$	8,387	$	7,498	$	889

Intangible assets by segment as of December 28, 2019 are as follows: TFE; $238,000 and Photonics; $36,000.

Total amortization expense of purchased intangibles for both fiscal 2019 and 2018 was $615,000.

Estimated future amortization expense related to finite-lived purchased intangible assets as of December 28, 2019, is as follows.

(in thousands)
2020	$	274