Case Details
- Citation: [2009] SGHC 206
- Case Title: ASM Assembly Automation Ltd v Aurigin Technology Pte Ltd and Others
- Court: High Court of the Republic of Singapore
- Date of Decision: 16 September 2009
- Judge: Tan Lee Meng J
- Case Number: Suit 163/2007
- Coram: Tan Lee Meng J
- Plaintiff/Applicant: ASM Assembly Automation Ltd (“ASM”)
- Defendants/Respondents: Aurigin Technology Pte Ltd (“Aurigin”); Lim Ee Teoh; Tam Wing Wah
- Counsel for Plaintiff: Dedar Singh Gill and Paul Teo (Drew & Napier LLC)
- Counsel for Defendants: Low Chai Chong, Lee Ai Ming and Alvin Lim (Rodyk & Davidson LLP)
- Legal Area: Patents and Inventions
- Statutes Referenced: Patents Act (Cap 221, 2002 Rev Ed) (“the Act”)
- Key Statutory Provisions Mentioned in Extract: s 29(1)(c), s 29(5), s 71(1)
- Patent at Issue: Patent No 104354 (granted 30 December 2005; priority date 8 January 2002)
- Corresponding Foreign Application: US Patent No 6,766,938B2
- Alleged Infringing Product: Aurigin AU800 automated BGA solder ball placement machine
- Related Aurigin Patents (as described): Singapore Patent No 111523 (priority 14 October 2002; granted 30 April 2007); US application/patent referenced as 10/531,611 (priority 2 December 2008)
- Judgment Length: 21 pages, 9,495 words
- Judgment Reserved: Yes
Summary
ASM Assembly Automation Ltd sued Aurigin Technology Pte Ltd and two of its directors for patent infringement in relation to ASM’s Singapore patent (Patent No 104354) concerning an apparatus and method for automatically placing an array of solder balls onto a substrate, particularly for ball-grid array (“BGA”) packaging. ASM alleged that Aurigin’s flagship AU800 machine infringed multiple claims of its amended patent, and sought declarations of validity and infringement, injunctive relief, and either damages or an account of profits.
In response, Aurigin denied infringement and counterclaimed for revocation of ASM’s patent on grounds including lack of novelty and inventiveness. Aurigin also pleaded statutory defences under the Patents Act, including a “serious and effective preparations” defence for manufacture and offer to sell prior to ASM’s priority date. The dispute therefore turned not only on claim construction and infringement analysis, but also on the availability and scope of statutory defences and the evidential weight of expert testimony in a technical field.
What Were the Facts of This Case?
ASM is a Hong Kong company engaged in manufacturing and selling semiconductor assembly and packaging equipment. It is the registered proprietor of Singapore Patent No 104354, granted on 30 December 2005. The patent’s priority date is 8 January 2002. The invention relates to an apparatus and method for automatically placing an array of solder balls onto a substrate, such as a BGA substrate. The patent was granted pursuant to s 29(1)(c) and s 29(5) of the Patents Act, relying on a corresponding US patent application (US Patent No 6,766,938B2). This background is important because it frames the patent’s technical lineage and the extent to which the Singapore grant reflects earlier foreign disclosures.
ASM’s pleaded infringement concerned Aurigin’s AU800 machine. Aurigin is a Singapore company. ASM alleged that the AU800 infringed claims 1–4, 6–7, and 11–12 of ASM’s amended patent. ASM further alleged that the second and third defendants, Lim Ee Teoh and Tam Wing Wah, as directors of Aurigin, directed, authorised, counselled, or procured Aurigin to infringe. The AU800 was described as an automated BGA solder ball placement machine housing a key solder ball placement module based on a design said to be patented by Aurigin in Singapore and the United States.
According to the extract, the AU800 was invented by Mr Lim and Mr Tam (together with Mr Ng Boon Chew). Aurigin’s solder ball placement module was patented in Singapore as Patent No 111523, granted on 30 April 2007 with a priority date of 14 October 2002. It was also patented in the United States (referenced as 10/531,611) with a priority date of 2 December 2008. Critically, the first two sets of the AU800 were sold by Aurigin on 19 November 2003. ASM’s priority date (8 January 2002) therefore sits earlier than Aurigin’s sales date, but the parties’ competing priority and preparation timelines became central to Aurigin’s statutory defence.
ASM’s remedies sought were typical for patent infringement litigation: a declaration that ASM’s Singapore patent is valid; a declaration that the AU800 infringes specified claims; an injunction restraining further infringement; and an inquiry as to damages, or alternatively an account of profits. Aurigin denied infringement and sought revocation of ASM’s patent for lack of novelty and inventiveness. Aurigin also pleaded that even if the patent were valid, it was entitled to rely on s 71(1) of the Act—concerning serious and effective preparations to manufacture and offer to sell the relevant product before ASM’s priority date. Aurigin further pleaded innocent infringement and asserted that ASM was not entitled to damages or an account of profits prior to 6 December 2006.
What Were the Key Legal Issues?
The first cluster of issues concerned infringement and validity. The court had to determine whether Aurigin’s AU800 fell within the scope of the relevant claims of ASM’s amended patent. This required proper construction of the claims—particularly the technical limitations concerning the positioning member, the movable container for solder balls, and the tilting mechanism designed to apply force to the solder balls during movement. In parallel, the court had to consider whether ASM’s patent was vulnerable to revocation on grounds such as lack of novelty and inventiveness.
The second cluster of issues concerned statutory defences and remedies. Aurigin’s reliance on s 71(1) raised the question whether Aurigin had made “serious and effective preparations” to manufacture and to offer to sell the AU800 before ASM’s priority date. If the defence applied, it could limit or negate infringement liability for the relevant period. The court also had to consider Aurigin’s plea of innocent infringement and the consequences for damages or an account of profits, including the asserted cut-off date of 6 December 2006.
Finally, there was an additional procedural and remedial dispute about threats. Aurigin sought an injunction restraining ASM from threatening Aurigin’s customers with legal proceedings for patent infringement. Aurigin also counterclaimed for groundless threats and sought an inquiry as to damages suffered. While the extract does not provide the court’s final disposition on this point, it indicates that the case involved both substantive patent rights and the conduct of enforcement.
How Did the Court Analyse the Issues?
A central feature of the court’s approach, as reflected in the extract, was the careful handling of expert evidence in a technical patent dispute. ASM called Assoc Prof Khong Poh Wah, an academic expert in mechanical and aerospace engineering, and also called Mr Robert Faber, a patent lawyer who had prosecuted ASM’s US patent. The court treated Mr Faber’s evidence as limited because he was not a person skilled in the art. The extract notes the court’s reliance on Ng Kok Cheng v Chua Say Tiong [2001] 3 SLR 487, where a patent attorney called as an expert was not considered an expert for issues requiring the perspective of a skilled person in the art. This reflects a broader evidential principle: patent prosecution expertise does not automatically substitute for technical expertise when the court must assess novelty, inventiveness, and claim scope through the eyes of the skilled person.
On Aurigin’s side, the court heard two expert witnesses: Assoc Prof Tay Meng Leong (also from NTU) and Mr Dennis Miller, a former senior director and vice-president of Motorola Inc. Mr Miller had substantial credentials as an inventor and innovator, including multiple patents related to BGA technology. The court indicated that Mr Miller’s evidence was “most useful” to the court. This is significant because BGA solder ball placement involves complex mechanical and process engineering issues, including flux contamination, oxidation, debris, and the handling of extremely small solder balls. The court’s analysis therefore depended on credible technical explanations of how the AU800’s module operated and how ASM’s claimed apparatus achieved its effects.
The extract also shows the court’s use of a technical primer on BGA technology to contextualise the patent claims. The court described BGA packages as integrated circuit packages with an array of solder balls on a substrate. It highlighted how miniaturisation created new problems: flux contamination, difficulties in picking up tiny solder balls, debris and machining variations, oxidation, and damage. The technical narrative included solutions such as separating processes (e.g., using templates and independent filling processes) and employing flux plates to mitigate contamination. This background is relevant to inventiveness analysis because it frames the problem-solution landscape and the extent to which the claimed features might have been obvious to a skilled person.
In setting out ASM’s claims, the court reproduced the amended claim set. Claim 1, in particular, required an apparatus with (i) a positioning member to direct solder balls to required positions; (ii) a container movable between a remote first position and a second position directly over the positioning member, and movable back to move solder balls away; and (iii) a tilting mechanism applying force to the solder balls in the direction of container movement between positions, with the tilting mechanism adapted to rotate the container about an axis perpendicular to the direction of motion to tilt it. Dependent claims added further features such as repeated rotational spreading (claim 2), controllable rotational angles and speeds (claim 3), a positioning rail and motor (claim 4), vibration generation (claim 5), a ball template with apertures slightly larger than solder balls (claim 6), pick-and-place removal while retaining positions (claim 7), and a closed container to reduce oxidation (claim 11).
Although the extract is truncated before the court’s final infringement and validity findings, the structure of the case indicates that the court would have proceeded through standard patent litigation steps: (1) identify the relevant claims and construe their technical limitations; (2) compare the accused device’s features to the construed limitations; (3) assess whether the patent was novel and inventive over prior art; and (4) evaluate whether Aurigin’s s 71(1) defence and other remedial limitations applied. The court’s emphasis on whether witnesses were “persons skilled in the art” suggests that the analysis of novelty and inventiveness would have been anchored in technical understanding rather than legal characterisations.
What Was the Outcome?
The provided extract does not include the court’s final orders. Accordingly, the precise outcome—whether ASM’s patent was upheld, whether infringement was found, and how the s 71(1) defence and groundless threats counterclaim were resolved—cannot be stated from the truncated text alone. A complete reading of the full judgment would be required to confirm the final determinations and the specific claims that were held infringed or not infringed.
That said, the case is clearly structured as a full trial addressing both infringement and validity, with additional relief sought regarding threats. The practical effect, once the full judgment is reviewed, would likely include declarations on validity/infringement (if granted), injunctions (if ordered), and financial consequences determined through damages or account of profits, subject to any statutory defences and innocent infringement limitations.
Why Does This Case Matter?
This decision is instructive for practitioners because it illustrates how Singapore courts manage technical evidence in patent disputes. The court’s approach to expert status—particularly its refusal to treat a patent attorney as a technical expert for “skilled person” questions—reinforces an important litigation strategy point. Parties should ensure that expert witnesses can speak to the relevant technical issues, not merely to prosecution history or legal interpretation. For claim construction, novelty, and inventiveness, the court’s focus is on what a person skilled in the art would understand, and the evidence must be aligned to that perspective.
Second, the case highlights the relevance of statutory defences under the Patents Act, especially s 71(1). Where an accused infringer can show serious and effective preparations to manufacture and offer to sell before the patentee’s priority date, liability may be limited. This makes the timing of development, manufacturing readiness, and commercial offers critical. Practitioners should therefore plead and prove detailed factual timelines, including documentary evidence of preparations, prototypes, testing, procurement, and sales or offers.
Third, the case underscores the practical importance of claim drafting and amendment. ASM’s claims were amended during the trial, and the court had to assess infringement against those amended claims. This is a reminder that claim scope is not static and that infringement analysis must be conducted against the operative claims. For defendants, it also means that invalidity and defence arguments should be tailored to the specific amended limitations rather than the original claim set.
Legislation Referenced
- Patents Act (Cap 221, 2002 Rev Ed)
- s 29(1)(c)
- s 29(5)
- s 71(1)
Cases Cited
Source Documents
This article analyses [2009] SGHC 206 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.