Vertical merger

(Economics) merger in which a company that supplies a component merges with a company that uses the component in its product (ex: computer manufacturer acquires microchip company)

The phrase mergers and acquisitions (abbreviated M&A) refers to the aspect of corporate strategy, corporate finance and management dealing with the buying, selling and combining of different companies  that can aid, finance, or help a growing company in a given industry grow rapidly without having to create another business entity.
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In microeconomics and managing management, the term vertical integration describes a style of ownership and control. The degree to which a firm owns its upstream suppliers and its downstream buyers determines how vertically integrated it is. Vertically integrated companies are united through a hierarchy and share a common owner. Usually each member of the hierarchy produces a different product or service, and the products combine to satisfy a common need. It is contrasted with horizontal integration. Vertical integration is one method of avoiding the hold-up problem. A monopoly produced through vertical integration is called a vertical monopoly, although it might be more appropriate to speak of this as some form of cartel.
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A merger in which one firm acquires another firm that is in the same industry but at another stage in the production cycle. For example, the firm being acquired  serves as a supplier to the firm doing the acquiring .

Vertical merger
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