ALT

What ALT does

ALT (주)에이엘티) is a South Korean KOSDAQ-listed (ticker 172670) semiconductor back-end test and post-processing company founded in 2003 and headquartered at the Osong Science and Technology Industrial Complex in Cheongju. The company specializes in post-process testing for non-memory semiconductors — specifically System-on-Chip (SoC), Display Driver ICs (DDI), CMOS Image Sensors (CIS), and Power Management ICs (PMIC) — and complements this test portfolio with proprietary back-end processes including Ring Cut (an ALT-developed laser wafer rim removal system), Recon (reconstruction of known-good dies into wafer form), and COG (Chip-on-Glass preparation). Together these offerings cover the late stages of the wafer test and assembly preparation value chain.

The company serves fabless semiconductor designers and integrated device manufacturers (IDMs) globally, with explicit references to long-term partnerships in PMIC testing and to customers in the display and imaging electronics end-markets. ALT's go-to-market is direct B2B sales supported by a technical sales team ([email protected]) and an IR function, and it operates from a single 101-250-employee facility in Cheongju. The company holds registered patents covering its Laser Rim Cut System and broader semiconductor process technology and IT infrastructure.

ALT's business model is fee-for-service testing and post-processing on a B2B basis; no public pricing, unit economics, or revenue figures are disclosed. The 2018 disclosures — convertible bond issuance, new share issuance, and a stock split — indicate the company has tapped public capital markets, and a 2022 limited-partner commitment to the Weeden-BDC Startup Investment Fund No. 1 (a 4 billion won Pangyo Techno Valley-focused vehicle) signals selective ecosystem participation alongside core operations.

Name

ALT

Legal name

(주)에이엘티

Website

https://alt-s.kr

Company type

Public

Founded year

2003

Operating status

Operating

Headcount range

1–10 employees

Short description

ALT (주)에이엘티) is a KOSDAQ-listed South Korean semiconductor back-end test and post-processing company serving fabless and IDM customers with DDI, CIS, PMIC, and SoC testing plus proprietary Ring Cut, Recon, and COG wafer processes from its Cheongju facility.

Ownership category

akta.pro rank

Product category

Semiconductor Testing Services

NAICS

Semiconductor Machinery Manufacturing (333242), Semiconductor and Other Electronic Component Manufacturing (33441), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Services-Testing Laboratories (8734), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Test Services (Wafer Sort, Final Test, Burn-In) (HDAHADAD)

akta.pro secondary industries

Outsourced Semiconductor Manufacturing Services (Back-End EMS/Turnkey) (HDAHADAJ), Test, Probe & Burn-In Equipment (Wafer Sort/Final Test) (HDAHAEAJ)

Keywords

• Semiconductor testing services
• Wafer post-processing
• Display driver IC testing
• CMOS image sensor testing
• Power management IC testing

Headquarters

HQ city

Cheongju

HQ country

South Korea

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Distribution channels1 record

Marketing channels3 records

Core offering

ALT provides outsourced semiconductor post-process testing and wafer-processing services for non-memory chips, including SoC, Display Driver IC (DDI), CMOS Image Sensor (CIS), and Power Management IC (PMIC) testing. The company additionally offers proprietary wafer post-processing services — Ring Cut (laser rim removal), Recon (known-good-die reconstruction), and COG (Chip On Glass) preparation — to global fabless and integrated semiconductor manufacturers.

Product overview

ALT ((주)에이엘티) is a semiconductor testing solutions company that offers a comprehensive portfolio of testing services and technologies for various integrated circuit types. The core product lineup includes SoC Test (System-on-Chip), DDI Test (Display Driver IC), CIS Test (CMOS Image Sensor), and Power IC Test (PMIC), along with specialized processes like Ring Cut (Laser Rim Cut), Recon (wafer die rearrangement), and COG (Chip On Glass) preparation. The company supports its testing operations with research and development, process technology, IT infrastructure, and maintains a portfolio of held patents. The overall offering is a unified semiconductor testing solution portfolio rather than a modular platform-plus-modules architecture.

Differentiator

Problem solved

Functional benefit

Products and services

• SoC Test System-on-Chip testing service that maintains high device performance while minimizing power consumption; offered to fabless and integrated semiconductor manufacturers.
• DDI Test Display Driver IC testing service that adjusts the numerous pixels of a display to implement various colors; targeted at display driver chip makers and display panel customers.
• CIS Test CMOS Image Sensor testing service that detects light, converts it to electrical signals, then to digital data for video output; for image sensor makers and imaging electronics customers.
• Power IC Test (PMIC) Power Management IC testing service delivered through long-term partnerships with global fabless and integrated semiconductor customers; serves power management chip manufacturers.
• Ring Cut (Rim Cut) ALT-developed Laser Rim Cut System service that removes wafer rims as part of wafer post-processing; offered to semiconductor manufacturers requiring wafer-edge conditioning.
• Recon (Reconstruction) Process that rearranges only the known-good dies from probe-tested wafers into wafer form to improve downstream assembly workability; serves semiconductor assembly and packaging customers.
• COG (Chip On Glass) Preparation Process that transfers only known-good dies from probe-tested materials to trays in preparation for downstream COG (Chip On Glass) assembly work; serves display driver IC and display assembly customers.

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Two partnerships are on record, tiered minor.

• BDC AcceleratorminorStrategic or Co-development Partner · 22 May 2022BDC Accelerator serves as General Partner in the Weeden-BDC Startup Investment Fund No. 1, a 4 billion won fund targeting startups in the 2nd Pangyo Techno Valley ecosystem. ALT participates as an investor in this fund alongside KOSDAQ-listed companies.
• (주)에이지피 (AGP)minorOthersAffiliated company (관계사) located at the same address in Osong Science and Technology Industrial Complex, Cheongju, South Korea.

Recent moves9 records

Expansion highlights4 records

Others

• FormFactor (incl. Cascade Microtech): Leading supplier of wafer probe and test equipment used by OSATs and IDMs, including the probe cards and handlers that underpin wafer sort operations such as ALT's. Adjacent value chain participant rather than direct service competitor.

Broad incumbents

• Amkor Technology: Global OSAT leader offering advanced packaging and test across consumer, automotive, and high-performance end-markets. Overlaps with ALT on DDI/CIS/PMIC test categories and competes for the same customer wallet.
• ASE Technology Holding: World's largest OSAT providing packaging and test services across logic, memory, and mixed-signal ICs. Competes with ALT for the same global fabless/IDM test programs but at vastly greater scale and broader scope.
• JCET (Jiangsu Changjiang Electronics Technology): Major Chinese OSAT with full back-end service portfolio including wafer probe and final test. Competes with ALT for global fabless customers seeking scale and integrated packaging plus test offerings.
• ChipMOS Technologies: Taiwan-based back-end service provider with strong test capabilities for display drivers, memory, and mixed-signal ICs. Directly comparable test portfolio with greater geographic reach than ALT.
• Powertech Technology (PTI): Taiwanese OSAT providing memory and logic packaging plus test services. Competes for global fabless and IDM test programs similar to ALT's customer base, though with stronger memory exposure.

Regional players

• Hana Microelectronics: Thai-listed OSAT and test provider serving fabless and IDM customers across Asia. Comparable back-end service model and customer segments, but based in Southeast Asia rather than Korea.

Direct peers

• SFA Semicon: Korean back-end semiconductor services company focused on packaging and test for display driver, power, and mixed-signal ICs. Closely comparable niche, customer base, and KOSDAQ scale to ALT.
• Signetics: Korean OSAT and test house serving fabless and IDM customers with wafer test and packaging. Direct competitor for Korean back-end test work, particularly in display driver and mixed-signal IC programs.
• STS Semiconductor & Telecommunications: Korean OSAT providing wafer test, packaging, and back-end services to fabless and IDM customers. Direct comparability on geography, customer base, and back-end service scope, including wafer probe and assembly-adjacent processes.

Market position

Strengths4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/alt-co-ltd

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ALT